Previously, if mvn spring-boot:run with a forked JVM was killed with 
CTRL+C, the run would be considered unsuccessful. This commits updates
the run mojo to consider a forked JVM that exists with 130 (the exit
code produced when exiting due to SIGINT which is what CTRL+C sends) to
be successful.

Closes gh-6498

Closes gh-6650

* pr/6644:
  Upgrade to Spring Security 4.1.2.RELEASE

Closes gh-6644

* pr/6540:
  Polish contribution
  Fix health endpoint security

Closes gh-6540

Commit b02aba4c has renamed `management.security.role` to
`management.security.roles`. Unfortunately, the `HealthMvcEndpoint`
was still looking at the old property.

This commit makes sure that the proper key is used and any custom
role is applied rather than an unconditional `ADMIN` role.

See gh-6540

* gh-6623:
  Use 'travis_wait' to prevent Travis CI from aborting builds

Builds use the '-q' flag to suppress most output due to a limit of 4MB
of logs on Travis CI. However, Travis will also abort builds that
don't generate any output for 10 minutes. Thus we also use the
'travis_wait' function to make sure builds aren't aborted for up to
30 minutes.

Fixes gh-6621
Closes gh-6623

* gh-6604:
  Ensure that @LiquibaseDataSource is preferred to “normal” DataSource
  Allow a DataSource to be marked as being specifically for Liquibase

Closes gh-6604

This commit allows to configure a special DataSource to be used by
Liquibase by annotating it with @LiquibaseDataSource.

Closes gh-6614

The unpack location is (largely) an implementation detail and the
Repackage Mojo was the only place where it was explicity documented.
Rather than updating the outdated location, this commit removes it
entirely to avoid encouraging people to rely on the location.

Closes gh-6624

Closes gh-6508

* pr/6556:
  Upgrade to Elasticsearch 2.3.5

Closes gh-6556

Closes gh-6628

Closes gh-6549

Call afterPropertiesSet on the delegate `ResourceHttpRequestHandler`
to prevent an NPE. This change is required for compatibility with
Spring Framework 4.3 following SPR-13834.

Closes gh-6592

Previously, CLI extensions where installed into the CLI's lib
directory which meant that they were on the class path of the app
class loader. Following the change to an executable jar's packaging,
this meant that they could not see classes in the CLI and a
ClassNotFoundException would result.

This commit updates the CLI to install extensions into lib/ext and
load commands using a new ClassLoader that has all of the jars in
lib/ext on its class path and that uses the launch class loader as
its parent.

Closes gh-6615

Previously, if a single FailureAnalyzer failed to load, no failure
analysis would be performed. This commit updates FailureAnalyzers to
load the analysers defensively so that all but the problematic analyzer
are used for analysis.

Closes gh-6606

Previously, MetricExportAutoConfiguration consumed
ExportMetricWriter-annotated GaugeWriter beans in its constructor and
also produced such a bean from one of its @Bean methods. This cycle
caused a BeanCurrentlyInCreationException to be thrown when the
bean method was active (the spring.metrics.export.statsd.host property
was set).

This commit break the cycle by moving the bean method into a separate,
nested configuration class. It also updates the existing test for
auto-configuration of a Statsd writer to catch any possible cycles
and to verify that the writer has be registered with the
MetricsExporter.

Closes gh-6544

META-INF/INDEX.LIST files are pointless in an executable jar and
moving application classes from the root of the jar to
BOOT-INF/classes breaks the index, resulting in an
InvalidJarIndexException being thrown.

This commit updates the Repackager to automatically remove a
META-INF/INDEX.LIST file from a jar file that is being repackaged.

Closes gh-6601

Previously, MockitoPostProcessor would fail to replace a factory bean
with a mock if the factory bean didn't return a matching type from
getObjectType(). This prevented Spring Data respoitories from being
replaced with a mock as Spring Data's repository factory beans
generally do not know the specific repository type that they will
produce when MockPostProcesser (a bean factory post-processor) is
running.

Spring Data has been updated to add a factoryBeanObjectType attribute
to its factory bean definitions. MockitoPostProcessor has been updated
to look for FactoryBeans with this attribute and to use its value
to determine whether or not the factory bean produces a bean of the
required type and, therefore, should be replaced with a mock.

Closes gh-6541

Closes gh-6576

* pr/6589:
  Document webjar-locator usage with JBoss

Closes gh-6589

* pr/6600:
  Apply sytem properties on HttpClient

Closes gh-6600

See gh-6536

Previously, a NullPointerException would occur if
endpoints.docs.curies.enabled was true and the default value was being
used for either server.port or management.port.

EndpointWebMvcHypermediaManagementContextConfiguration has been
restructured to ensure that the DocsMvcEndpoint bean is defined before
the condition on its existence is evaluated. Previously this was
dependant on the class’s bean methods being processed in a particular
ordering, something that would be ok when using ASM but would vary when
using reflection.

Closes gh-6584

Closes gh-6567
See gh-6583

Closes gh-6552

* pr/6580:
  Polish contribution
  Add reference to Apache CXF integration