Update ConfigFileApplicationListener to include more debug level output.
Debug messages are recorded during onApplicationEnvironmentPreparedEvent
but not actually output until onApplicationPreparedEvent. This is
because the logging level might not have been correctly set until the
context is completely prepared.

Fixes gh-1584

Previously, only the state of the primary connector was checked when
verifying that the embedded Tomcat instance has started successfully.
This commit updates the verification logic to examine all of the
service's connectors, thereby also detecting startup failures of any
additional connectors the have been configured.

A check on the primary connector's state has been removed from
initialize as, at this stage, its state will always be NEW.

Fixes gh-1591

Redundant @ConditionalOnMissingBean annotation has been removed.
ActiveMQConnectionFactoryConfiguration is not auto-configuration and
is imported by ActiveMQAutoConfiguration which is protected by
@ConditionalOnMissingBean(ConnectionFactory.class)

See gh-1599

Closes gh-1596

Some frameworks handle all requests in a Filter, so you have to
explicitly register it as an ERROR dispatcher.

See gh-1272

Done in order to align with the rest of the configuration. Absent this
check, the bean will be installed in non-web applications without the
corresponding dependencies, causing the bootstrap to fail.

Closes gh-1588

Corrected the documentation to refer to file as tests.groovy, rather
than test.groovy. Updated cope snippet as tests.groovy should expect
"Hello World!" rather than "Hello World".

Closes gh-1593

Extract banner.txt logic to ResourceBanner and include support for
`spring-boot.version` and `application.version` properties.

Fixes gh-1586

... or couldn't hurt anyway.

1. Extends the definition of a web application for @ConditionalOnWebapp
so that a StandardEnvironment can be used (cutting out JNDI failures
for Environment properties)

2. Doesn't bother using StandardServletEnvironment in integration tests

3. Make the NON_ENUMERABLE_ENUMERABLES in PropertySourcesPropertyValues
static so they only get initialized once (not a huge issue at all)

Use File.separator rather than hard-coding the use of ‘/‘

Closes gh-1571

Fixes gh-1574

Update `LogbackLoggingSystem` to call the `reset()` method on the
`LoggerContext` before initialization.

This will hopefully reset the context to prevent the same appenders
from being accidentally added more than once.

Fixes gh-1091

This is a continuation of the changes made in 611f9781. It makes some
more @Bean methods public and adds tests to spring-boot-actuator and
spring-boot-autoconfigure to prevent against non-public methods being
introduced in the future

Closes gh-1571

Cherry pick documentation updates which appear to have been
lost during a previous merge.

Fixes gh-1523
Cheery-picked from 16c2477d

Fixes gh-1571

Conflicts:
	spring-boot-samples/spring-boot-sample-tomcat-ssl/pom.xml
	spring-boot-samples/spring-boot-sample-tomcat-ssl/src/test/java/sample/tomcat/SampleTomcatSslApplicationTests.java
	spring-boot/src/main/java/org/springframework/boot/context/embedded/ConfigurableEmbeddedServletContainer.java
	spring-boot/src/main/java/org/springframework/boot/context/embedded/Ssl.java

Fixes gh-1570
Cherry-picked from 0960908b and 258c6f11

Fixes gh-1548 again