Tweak `Restarter` to clear caches on the initial restart.

See gh-3082

Update Javadoc to use the {@code ...} syntax when possible.

* patch-16:
  Remove invalid parts of docs after refactoring

* typos:
  Fix typos

for users to get started. It also makes it more flexible if different
aggregation keys are needed depending on the environment. The most
important new feature is the
spring.metrics.export.redis.aggregateKeyPattern configuration, which
fits the *.redis.key and prefix defaults. The aggregate reader uses
a prefix based on the key by default, with a naming convention that
the key starts with "keys.".

Update the Maven and Gradle repackage tasks so that the embedded
startup script is no longer included by default. This change is
primarily due to the `cf` command line not currently accepting
the unusual jar format.

Fixes gh-3045

Update DevToolsPropertyDefaultsPostProcessor to set the following
additional template cache properties to `false`:

	spring.freemarker.cache
	spring.groovy.template.cache
	spring.velocity.cache
	spring.mustache.cache

Fixes gh-3125

The FileWatcher sometimes generates multiple events for a single change
and if there is a slow shutdown hook the second one can come in before
the context is closed, leaving it in a tricky state. This change
attempts to stop the file watcher as soon as it detects a change
(the stop() method is called in the listener, which normally happens in
the same thread as the scan).

Fixes gh-3097

Fixes gh-3099

* fix-doc:
  Remove spock caveat that was fixed in 1.0

Closes gh-3072

* patch-15:
  polish
  Document `spring.metrics.export.*` properties

Closes gh-3110

See gh-3110

* patch-14:
  Remove duplicate in MetricExportProperties

Closes gh-3109

Fixes gh-3112

Fixes gh-3113

Closes gh-3098

* cache:
  Polish Javadoc

Closes gh-3101

Add OrderedHiddenHttpMethodFilter and use it in WebMvcAutoConfiguration
to ensure that it is applied before Spring Security.

Fixes gh-2773