Fix gemfire & twitter script tests

- Added explicit sleep to make sure there are no timeout issues.
shutdown leader Admin on context stop
XD-1483, XD-1484, and XD-1485

XD-1485: Modify module deployments path

https://jira.spring.io/browse/XD-1485

Modified deployments path from /xd/deployments/[container]
to /xd/deployments/modules/[container]. This will pave the
way to allowing for the use of /xd/deployments/streams
to handle stream deployment.

XD-1483: StreamListener watches /xd/deployments/streams

https://jira.spring.io/browse/XD-1483

XD-1484: JobListener watches /xd/deployments/jobs

https://jira.spring.io/browse/XD-1484

Removed "deploy" flag from Streams and Jobs. Deployments are
now handled via additions/removals from /xd/deployments/streams
and /xd/deployments/jobs.

merged after addressing review comments
fix race condition for stream properties