Closes gh-2675

Previously, only a handful of properties could be set when
auto-configuring an Elasticsearch client. This commit introduces support
for configuring arbitrary properties using the
spring.data.elasticsearch.properties prefix. For example,
client.transport.sniff can be configured using
spring.data.elasticsearch.properties.client.transport.sniff.

Closes gh-1838

Using a Class reference can cause reflection problems at runtime (see
gh-1065).

Closes gh-2674

Closes gh-2332

Rework 7b2b1190 so that it is more aligned with others spring
application events. Fix the package tangle by moving the publication part
to EventPublishingRunListener.

Closes gh-2638

Previously, a TransportClient sniff property could not be configured
while using Spring Boot’s Elasticsearch auto-configuration. This commit
adds a new property, spring.data.elasticsearch.client-transport-sniff,
that can be used to configure the TransportClient while continuing to
use the auto-configuration support.

Closes gh-1838

Wrap at 90 chars more consistently

Closes gh-2570

Conflicts:
	spring-boot-dependencies/pom.xml

Closes gh-2582

* gh-2375:
  add spring-boot-sample-activemq

The actual required Spring Framework version is 4.1.5.

See gh-2575

The example `@Value("server.local.port")` should read
`@Value("${local.server.port}")`.

Fixes gh-2628

Update HealthIndicatorAutoConfiguration to reduce the amount of
duplication in inner configuration classes.

Closes gh-2662

In ActiveMQ 5.11 the signature of
PooledConnectionFactory.setConnectionFactory has changed. It now takes
an Object rather than a ConnectionFactory. This change is not binary
backwards compatible so it causes a NoSuchMethodError as we compile
against 5.10.

This commit updates ActiveMQConnectionFactoryConfiguration to call
the setConnectionFactory method reflectively, looking for both the
ConnectionFactory and Object variants.

Closes gh-2640

Closes gh-2647

PropertySourcePropertyValues tries to process a PropertySource first
as an EnumerablePropertySource and then as a CompositePropertySource.
In Spring 4.1.2 CompositePropertySource was updated to extend
EnumerablePropertySource. This change meant that a
CompositePropertySource would always be processed as an
EnumerablePropertySource.

This commit updates PropertySourcePropertyValues to process a
PropertySource as a CompositePropertySource first and to then try it
is an EnumerablePropertySource.

Fixes gh-2608

Unfortunately it still has to happen in a @PostConstruct (otherwise
JPA never sees the schema in time), but we can delay a bit by not
using @Autowired. Appears to fix the Spring Cloud problem
(https://github.com/spring-cloud/spring-cloud-config/issues/105).

Fixes gh-2658

Add `create` as a valid values for `spring.jpa.hibernate.ddl-auto`

Fixes gh-2641