XD-1158 Added scripts to exercise jms and mqtt.

Added small pause for test results to return

* For the jms tests the tester sends a http message to an activemq instance at localhost 8161.
So for this test you will need to install activemq.

* For the mqtt tests the XD is still using the mqtt M1 release that has a bug.  The current
workaround is to reference the snapshot instead.
    * So in your build.gradle file replace springIntegrationMQTTVersion = '4.0.0.M1' with springIntegrationMQTTVersion = '4.0.0.BUILD-SNAPSHOT'
    * then run a ./gradlew clean dist

Code updated for based on code review.

Added activemq setup notes
Fix BatchJobLocator & UI model refresh

- Fix BatchJobLocator's getIncrementable(jobName) to return
  false if the job is not deployed (not launchable).
- Fix UI model refresh flag
XD-1166 added gemfire test scripts

also fixed a couple of config issues along the way

documented how to run gemfire_stream_tests in comments at top of file
XD-1166 added sleep to gemfire stream tests
XD-1171 Assign unique id for launcher

- Use the XDContainer's randomly generated UUID as its id
- Use XDContainer's id as the launcher context id
ChannelInterceptorAdapter moved
INT-1164 Update SI, MQTT to 4.0.0.M2
Revert "INT-1164 Update SI, MQTT to 4.0.0.M2"

This reverts commit d0181fb040961158dfc9aaba5a2783969a68e558.
XD-1164 Update SI, MQTT to 4.0.0.M2
Merge branch 'master' into XD-1161
XD-1161 Better handling for file paths