Include getters and setters with the sample class.

Fixes gh-2813

- added setIndices to ElasticsearchHealthIndicatorProperties to enable
  setting the indices property from configuration files
- Elasticsearch cannot handle "null" if the health of all indices should
  be checked; use "_all" instead

Closes gh-2812

Add setter for cache names so that it can be bound both via indexed
access and comma-separated list.

Keys with explicit indexes (e.g. foo[bar]) were handled only
partially before this change and in quite a crude way. The main
new feature (or fixed bug if you prefer) is that map keys with
periods were not identified correctly, so foo[bar.spam] came out
wrong. By scanning the key for indexes "[]" first, we can split
the logic better to make sure that all keys can be explicitly
indexed if desired. I believe this would work in YAML as well
but it definitely works for properties file inputs.

Fixes gh-2387 (I believe)

* feature/grep-metrics:
  Add additional MetricsMvcEndpoint regex tests
  Add regex support to /metrics and /env endpoints

Update MetricsMvcEndpointTests to test for regular expression based
calls.

Closes gh-2252

Update MetricsMvcEndpoint and EnvironmentMvcEndpoint to support regex
filter of names.

See gh-2252
Add it

Update FlywayAutoConfiguration to support pluggable migration
strategies. Rather than always calling flyway.migrate(), users can now
provide a FlywayMigrationStrategy @Bean to call whatever methods they
wish.

Fixes gh-1814

* fix747:
  Support ANSI color from gradle bootRun

Update the BootRunTask to record the state of the System.console() so
that it can be picked up later by AnsiOutput.

Fixes gh-747

Change the "cloud deployment" section to cover general "deployment" and
add documentation for init.d and systemd support.

Closes gh-1117

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