Update the Maven and Gradle plugin to generate fully executable jar
files on Unix like machines. A launcher bash script is added to the
front of the jar file which handles execution.

The default execution script will either launch the application or
handle init.d service operations (start/stop/restart) depending on if
the application is executed directly, or via a symlink to init.d.

See gh-1117

This commit updates Spring Boot to use Spring Security 4. As a result
of this, the coordinates of Thmyeleaf's Spring Security extra, for
which dependency management and auto-configuration is provided, have
been updated to the Spring Security 4 variant.

Closes gh-2727

When reverse==false we have to be careful to remove the right element
when capacity is reached.

The versions in the dependency management for the various datastore
dependencies have been aligned with those used by Spring Data Fowler.

The Data REST tests and sample application has been updated to configure
the base path in favour of the deprecated base uri property

Closes gh-2673

Default to true (so existing apps change their behaviour, but that
seems to be the majority vote).

Fixes gh-2794

 - Nest the configuration class in HealthIndicatorAutoConfiguration,
   bringing it into line with the other health indicator configuration
   classes
 - Include the statistics from the response in the health’s details
 - Map YELLOW to UP rather than UNKNOWN as it indicates that the cluster
   is running but that “the primary shard is allocated but replicas are
   not” [1]. The details can be used to determine the precise state of
   the cluster.
 - Add a property to configure the time that the health indicator will
   wait to receive a response from the cluster
 - Document the configuration properties
 - Update the tests to cover the updated functionality

See gh-2399

[1] http://www.elastic.co/guide/en/elasticsearch/reference/1.x/cluster-health.html

Closes gh-2399

This commit adds support for configuring an ObjectMapper's
serialization inclusion using the environment via the
spring.jackson.serialization-inclusion property. The property's value
should be one of the values on the JsonInclude.Include enumeration.
Relaxed binding of the property value to the enum is supported. For
example:

spring.jackson.serialization-inclusion: non_null

Closes gh-2532

Closes gh-2615

Previously GsonHttpMessageConvertersConfiguration was unconditional
with its nested configuration class being
@ConditionalOnClass(Gson.class). This led to the unnecessary
registration of the GsonHttpMessageConvertersConfiguration bean when
Gson isn't on the classpath.

This commit moves the condition up onto the outer class so that no
Gson-related beans are created when Gson is not on the classpath.

Closes gh-2778

Closes gh-2788

Closes gh-2787 (I hope)

This commit improves upon the changes made in a8bf9d34 by adding
support for relaxed binding of the endpoints.enabled and
endpoints.<name>.enabled properties. This is achieved by replacing
use of @ConditionalOnExpression (which does not support relaxed
binding) with a custom condition implementation that uses
RelaxedPropertyResolver.

Closes gh-2767

Closes gh-2712

Closes gh-2779

Previously, only invocations of /metricName/ would honour the enabled
property and return a not found (404) response. For endpoints which
support nested paths, access to /metricName/foo would ignore the enabled
flag and return an OK (200) response. Furthermore, there was a comment
in EndpointMvcAdapter that suggested that an endpoint shouldn’t be
called when it is disabled, however this was not the case.

This commit updates EndpointWebMvcAutoConfiguration and
JolokiaAutoConfiguration to only register their MvcEndpoint beans if
the underlying endpoint is enabled. This means that an
EndpointMvcAdapter should not be called if its delegate is disabled,
making the comment described above accurate.

The check for the delegate being enabled has been retained so as not to
rely upon the auto-configurations’ behaviour. The methods which handle
nested paths (MetricsMvcEndpoint.value() and
EnvironmentMvcEndpoint.value()) have been updated to add the same check
for the enablement of their delegate.

Fixes gh-2767

Add a new ConditionalOnSingleCandidate condition that determines if the
condition should match only if autowiring by type is guaranteed to
succeed. Used by auto-configuration that relies on a single candidate of
a given type (for instance, the JdbcTemplate auto-configuration relies on
the presence of a DataSource).

Such wiring by type will succeed if only one bean of that type is present
or if one matching instance is flagged "primary" amongst the candidates.

ConditionalOnSingleCandidate is a basic version of ConditionalOnBean that
only accepts a single type and does not determine a defaut based on its
presence on a bean definition.

Closes gh-1702

See gh-2776

Conflicts:
	spring-boot-dependencies/pom.xml

Closes gh-2776

Closes gh-2782

Closes gh-2781

Closes gh-2775

Update SpringBootMockServletContextTests to URL escape file paths.

Fixes gh-2771