Replace the getMaxActive() call with getMaxActiveSessions().

Fixes gh-1902

Fixes gh-1918

This reverts a change that I assume was orphaned from work in
progress to address #1353, but is no longer needed. Anyway
there is no reason to restrict MvcEndpoints to be unique by
path since they can declare their own @RequestMappings
(and if there are duplicates they will be detected when those
are scanned).

Fixes gh-1911

Relocate AnsiOutputApplicationListener to `context.embedded.config`
to fix package tangle.

See gh-1243

Add additional @AutoConfigureAfter elements to ActiveMQAutoConfiguration
and HornetQAutoConfiguration to ensure that they are configured after
JndiConnectionFactoryAutoConfiguration.

The possible sources for a JMS ConnectionFactory are:

1. JNDI
2. HornetQ (embedded broker or an external broker)
3. ActiveMQ (embedded broker or an external broker)

The last two auto configurations must run after JTA auto-configuration
has completed as it may register additional beans that are necessary to
enable XA.

Previously, the HornetQ embedded broker would start regardless of the
presence of a ConnectionFactory as a ConditionalOnMissingBean was
missing. Furthermore, there was no order condition for the JNDI
auto-configuration so it may just run after one of the broker has been
found.

JNDI takes now precedence to be consistent with the regular DataSource
auto configuration.

Fixes gh-1821

Fixes gh-1848

* metrics/activeSessions:
  Add Tomcat public metrics for session usage

Fixes gh-1860

Fixes gh-1900

Fixes gh-1898

This reverts commit 325d7512.

Conflicts:
	spring-boot-dependencies/pom.xml

Fixes gh-1872

Fixes gh-1899

Conflicts:
	spring-boot-dependencies/pom.xml

Fixes gh-1874

Closes gh-1849

hibernate-jpamodelgen was requested by a Boot user. hibernate-ehcache
and hibernate-envers were requested by a Spring IO Platform user (see
spring-io/platform#11

Closes gh-1896

Previously, WarLauncher included its root on the classpath. It also used
a filtered version of its root archive to hide both the WEB-INF and
META-INF directories. This meant that files in WEB-INF and META-INF
could be found by the classloader (as they were on the classpath) but
could not be read as the filtered archive was hiding them.

This commit updates WarLauncher to remove the root of the war file from
the classpath. It also removes the filtering of the archive, thereby
allowing files in META-INF and WEB-INF to be accessed via the
ServletContext.

Closes gh-1792

Previously, the tests for Boot’s various logging systems used the
JVM’s default temp directory as the location of the spring.log file.
It is suspected that this was causing intermittent CI failures when
multiple Boot builds were running in parallel and tests were checking
for the presence of the spring.log file in the shared temp directory.

This commit updates AbstractLoggingSystemTests to configure a local
temp directory for the duration of the tests, thereby hopefully
eliminating failures caused by concurrent builds sharing the same
directory.

The previous attempt at fixing the intermittent CI failures (504de8a7)
has been removed as part of this commit as it did not fix the problem.

Closes gh-1864

Conflicts:
	spring-boot-dependencies/pom.xml

Closes gh-1785

Closes gh-1890

Closes gh-1895

Closes gh-1894

Closes gh-1892

Closes gh-1891

Closes gh-1889

Closes gh-1888

Closes gh-1887

Closes gh-1886

Closes gh-1885

Closes gh-1805

Provide a default UTF-8 encoding for HTTP requests and responses unless
specified otherwise.

Fixes gh-1182