Update ConfigurationPropertiesBindingPostProcessor to ensure that
the defaultConversionService is only created once.

Fixes gh-1822

Disable JTA auto-configuration altogether with a simple property. This
can be useful if the environment is JTA capable but the application does
not require it.

Fixes gh-1457

Enable ConditionalOnJndi evaluation and add tests that validate it works
as expected

Fixes gh-1820

Override the default StringHttpMessageConverter provided by the standard
Spring MVC configuration so that is uses UTF-8 instead of the aging
default of the servlet spec (that is ISO-8859-1)

Fixes gh-1800

Fixes gh-1816

See gh-1590

Fixes gh-1104

If the DataSource is a Tomcat one we force it to register an MBean
if spring.jmx.enabled=true

Fixes gh-1590

This commit updates the help command to also show some example(s) to
illustrate how the command can be used. The commit also defines useful
examples for the init command

Fixes gh-1809

This commit reworks a7e1ec84 to fix the build failure and update the
documentation regarding default maven filtering option with
spring-boot-starter-parent

Fixes gh-1199

Prior to this commit, specifying the --format and/or --build options
alongside --type did not use the explicit type as it should. This commit
ignores the --build and --format options if a type is explicitly set.

Fixes gh-1807

Closes gh-1709

It *is* very useful to have filtering on by default, so that is now
the case (in spring-boot-starter-parent). Users can filter resources
by default by adding @*@ placeholders (so as not to clash with Spring
${} placeholders).

Fixes gh-1199

This commit moves the --output switch to a regular argument. This aligns
to other command, i.e. spring init my-project.zip would save the project
to "my-project.zip" in the current directory.

This commit also auto-detects the --extract option if the location ends
with a slash, i.e. spring init demo/ would extract the content of the
project in a demo directory that is local to the current directory.

Fixes gh-1802

The old resolver class is deprecated already, and there's no reason
to continue to support the View and View resolver implementations
from Boot 1.1, so I removed those. Also there is no need to support
older versions of Groovy, so I removed a config class that was
conditional on a groovy version (by looking for the markup support).

Fixes gh-1578

Update `GroovyTemplateAutoConfiguration` to use Spring 4.1 Groovy
Markup Template infrastructure instead of Boot's.

Fixes gh-1552

Add an appendix to the reference documentation describing the format
of configuration meta-data and how the annotation processor can be used.

Closes gh-1001

Add a @NestedConfigurationProperty annotation which can be used to
customize how configuration mete-data is generated.

Prior to this commit only inner-classes where considered nested
(see Tomcat in ServerProperties). Using this new annotation, the Ssl
property in ServerProperties can be detected as well.

See gh-1001

Update the `spring-boot`, `spring-boot-autoconfigure` and
`spring-boot-actuator` project to generate configuration meta-data
files during compilation.

See gh-1001

Update `ConfigurationMetadataAnnotationProcessor` to include the
'defaultValue' of a property when possible. For example the
'defaultValue' or 'server.port' is '8080'.

Default values are detected by inspecting the field assignments of
@ConfigurationProperties items. In order to detect field values some
internals of the Java compiler are used. To save a dependency on
'tools.jar' internal javac classes are accessed using reflection.

See gh-1001

Adds an annotation processor to generates a JSON meta-data file at
compile time from @ConfigurationProperties items. Each meta-data file
can include an array or 'properties' and 'groups'.

A 'property' is a single item that may appear in a Spring Boot
'application.properties' file with a given value. For example,
'server.port' and 'server.context-path' are properties. Each property
may optionally include 'type' and 'description' attributes to provide
the data type (e.g. `java.lang.Integer`, `java.lang.String`) and
some short documentation (taken from the field javadoc) about what the
property is for. For consistency, the type of a primitive is translated
to its wrapper counterpart, i.e. `boolean` becomes `java.lang.Boolean`.

A 'group' provides a higher level grouping of properties. For example
the 'server.port' and 'server.context-path' properties are in the
'server' group.

Both 'property' and 'group' items may additional have 'sourceType' and
'sourceMethod' attributes to indicate the source that contributed them.

Users may use `META-INF/additional-spring-configuration-metadata.json`
to manually provide additionally meta-data that is not covered by
@ConfigurationProperties objects. The contents of this file will be
read and merged with harvested items. The complete meta-data file is
finally written to `META-INF/spring-configuration-metadata.json`.

See gh-1001

Update OnBeanCondition to use a new BeanTypeRegistry which includes
optimized code when using a DefaultListableBeanFactory. The optimized
version calculates bean types only once per bean and caches the result.

Prior to this change the sample "pet clinic" application would spend
400-500 milliseconds evaluating OnBeanConditions, after this change it
spends around 120 milliseconds.

Fixes gh-1803

Update ManagementSecurityAutoConfiguration to return
IgnoredPathsWebSecurityConfigurerAdapter rather than
WebSecurityConfigurer<WebSecurity>.

Conflicts:
	spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/security/SecurityAutoConfigurationTests.java

Instead of just blindly creating the default authentication manager, after
thic change we count the beans of type GlobalAuthenticationManagerConfigurer
and assume that if we detect more than we expect (one from Boot and one from
Spring Security) then the user is telling us they want to configure the
AuthenticationManager themselves.

Fixes gh-1801

Change InitializrService to use a late binding CloseableHttpClient
since the calling `HttpClientBuilder.create().build()` is slow.

Fixes gh-1764

Rename a few classes and methods and extract some logic into helper
classes. Also change 2 char shortcuts to a single char.

Closes gh-1751

Apply eclipse formatting rules to b2fe2dd9.

See gh-1751

See gh-1801

Fixes gh-1775