Closes gh-6149

* pr/5290:
  Support JSPs in Embedded Jetty

JSPs are now supported in executable WARs with embedded Jetty.

Fixes gh-367
Closes gh-5290

Closes gh-6132

Closes gh-5825

See gh-6163

Previously, Spring Data Redis assumed that the class loader that loaded
its classes would also be able to load the application’s classes. This
assumption is faulty when there are multiple class loaders involved
such as when using dev tools or when Spring Data Redis is installed as
a shared library in a servlet container.

DATAREDIS-427 and DATAREDIS-501 removed this assumption by making the
default serialiser use the bean class loader. DevTools configures this
class loader to be the restart class loader which can load the
application’s classes. As a result of moving to Hopper SR2 snapshots,
these fixes are now available and we can remove our custom serialised.

Closes gh-5760

Closes gh-6165

Closes gh-6163

Closes gh-6162

As of Spring Framework 4.3, spring-aop now embeds the classes from the
aopalliance:aopalliance jar. This means that the transitive dependency
on aopalliance:aopalliance is redundant and it can be excluded.

Closes gh-6159

Closes gh-6161

Closes gh-6158

Closes gh-6157

See gh-6032

Fixes gh-2460

(according to Eclipse it was broken)

In fact the folder was already created if the app is running as
a different user, but not if running as the current user, so it
was just a question of moving one line out of an if block.

Fixes gh-5986

Closes gh-6150

* pr/6155:
  Polish

Closes gh-6155

Closes gh-5079

This commit adds a Jest-based health indicator for ElasticSearch. If both
Jest and the Spring Data are available, the latter takes precedence as it
provides more information.

Closes gh-3178

This commit adds auto-configuration support for Jest, an HTTP client for
Elasticsearch. If Jest is present, a `JestClient` targeting a local
elasticsearch instance is auto-configured. Several properties from the
`spring.jest.*` namespace allows to tune the client.

Closes gh-6032

Closes gh-6128

See gh-6147

* pr/6117:
  Charon reverse proxy starter added to docs

Closes gh-6117

* 1.3.x-liquibase-endpoint:
  Close connection after use in LiquibaseEndpoint

Update LiquibaseEndpoint so that connections are closed and returned to
the pool after use.

Fixes gh-6118

Update SpringApplicationBuilder so that properties of the form
`abc=d:e:f` are correctly parsed. Prior to this commit the `:` delimiter
would always be chosen over `=`, even if `=` occurred first.

Fixes gh-6121

Update TypeUtils to guard against the use of older Java versions.
Both `Collection` and `Map` type lookups now fallback to generic free
versions of the classes.

Prior to this commit using `xmlbeans-maven-plugin` in combination with
Spring Boot's annotation processor could result in
`IllegalArgumentException: Incorrect number of type arguments`.

Fixes gh-6122