Cassandra sometimes takes a long time when dropping the test keyspace.
This results in the test failing due to an exception being thrown.
This commit attempts to make the tests more robust by catching and
logging any exceptions thrown during server cleanup.

* pr/7166:
  Upgrade to Spring Integration Java DSL 1.2.0.RELEASE

Closes gh-7166

Closes gh-7136

Closes gh-7092
Closes gh-7093

Previously, a relative PID folder was not handled correctly when
running stop, status, or force_reload. This meant that a service
could be started when configured to use a relative pid file, but
then could not be stopped.

The PID folder should be treated as relative to the service's jar
file. This commit updates stop, status, and force_reload to push the
jar file's directory so that this is now the case for those three
commands.

Closes gh-7092

Closes gh-7144

Closes gh-7145

Closes gh-7159

See gh-7136

1.6.4 snapshots are required for compatibility with Spring Retry 1.2

See gh-7158

Update EndpointHandlerMapping so that it can be subclasses easily.
Subclasses can override the `path` that is used to map the endpoint,
allowing different mapping strategies to be used.

See gh-7108

Add an additional method to EndpointHandlerMapping which allows
endpoints of a specific type to be returned.

See gh-7108

Introduce a new NamedMvcEndpoint interface which can be used when an
MvcEndpoint also has a logical name. Existing MvcEndpoints have been
reworked to implement the NamedMvcEndpoint interface.

Fixes gh-7156

Add a @ConditionalOnCloudPlatform annotation that matches based on the
active ClouldPlatform.

Fixes gh-7155

Remove EndpointWebMvcManagementContextConfiguration `disabled` logic
since the configuration should even be processed when the management
port is `-1`.

Closes gh-7154

Fix the TestEndpoint constructor to use an ID parameter rather than
path.

Rather than disabling checkstyle altogether, this commit enables it
again, relaxing the javadoc requirement only.

See gh-7142

Closes gh-7142

Closes gh-7147