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

See gh-7044

Closes gh-7044