XD-1937 - Added licenses for all third party dependencies that are not Apache 2.0
XD-1999 Remove unused post module references

- Remove the classes that were used by `post` source module which
no longer exists.
XD-1999 - Remove unused post module references

Remove from configuration classes
XD-1936 - remove mysql client library from distribution zip
XD-1930: Fix java8 compile warning

ContainerConfiguration is now a (still default visibility & top level)
non-auxiliary class.
XD-1749 - Update tuple contract to throw exception on getValue for nonexistent field name
XD-1749 un-ignoring some tests, removing others
XD-1825: Remove all javadoc warnings
XD-1652 Fix inconsistent test failures

- Fix inconsistent test failures at `StreamDeploymentIntegrationTests`
  - Use random available port for http source module
XD-293 package-info.java in all packages

- Add missing `package-info.java` to all the packages
- Fix/Update javadoc
- Move `org.springframework.xd.dirt.XDRuntimeException`
to `org.springframework.xd.dirt.util.XDRuntimeException`

Code review changes

- Move `XDRuntimeException` to DIRT base package again
  - Add package-info.java

Fix EOF line at package-info.java files

Fix typo in javadoc
XD-1975 Twitter Dispatcher Has No Subscribers

JIRA: https://jira.spring.io/browse/XD-1975

The root cause was the StreamPlugin stopped the bus
(unbound the producer) before the module was stopped.

- separate the unbinding of bus consumers and producers.
- unbind the consumer before stopping the module
- unbind the producer(s) after stopping the module

In addition, the Custom Twitter adapters emitted messages after stop.
Stop does not block so the context may stop the consumer
before the adapter has actually stopped. For example, the
TwitterSearch module has a `<router/>` subscribed to the adapter's
channel.

- Don't use an Integration scheduler thread
- Block stop() until the thread has terminated
- Put the adapter in `phase` Integer.MAX_VALUE / 2 so it will be stopped before the consumer.

XD-1975 Polishing - PR Comments

Name the thread used by the twitter adapters.
XD-1961: Hide hidden module option info by default

Tweak listeners module option doc
XD-1990: Cross reference Shell and ShellReference
XD-1749 un-ignored MessageStoreBenchmarkTests

The test had been ignored and therefore became out-of-date (i.e. it no longer worked).

The test does not contain any asserts for benchmarking (i.e. it does not assert any performance thresholds).
It only prints out the time spent within each execution.

The following vars can be updated for benchmarking:
* EXECUTIONS_PER_STORE_TYPE
* MESSAGE_GROUPS_PER_EXECUTION
* MESSAGES_PER_GROUP

It is useful as a test for the aggregator processor itself, exercising each message store type.

Also updated the aggregator processor so that it uses the correct Redis client lib (Jedis, no longer Lettuce).

test log4j Polishing
XD-1749b - Change String to Number converter to not map empty string to null.

- Added remaining tests from Spring Batch's DefaultFieldSetTests
XD-2006: Logging improvements

Ensure that each admin and container process has its own unique
log file.

Increased the log file size threshold for rollover.
XD-1991 Use tomcat from platform

- Explicit use of tomcat version to handle logging introduces
the issue on memory leak from `WebappClassLoader` reported in
XD-1991.
 - Use tomcat from platform (assuming little bit of tomcat logging from
apache.catalina/apache.coyote is fine)
- Remove `WebappClassLoader`'s logging settings from config

Add jul-to-slf4j runtime dependency
  - This will enable SLF4JBridgeHandler to reroute tomcat logging
to SLF4J
XD-2005: IllegalStateException when shutting down

Tap removal exceptions are ignored if the ZooKeeper connection
is not active. Additionally, tap nodes are now ephemeral
so they will be removed automatically when the ZooKeeper
connection goes away.
FieldSetSqlParameterSourceProvider to spring-xd-batch

- Move out of `spring-xd-hadoop`
XD-1998: Remove jersey test dependencies