Provide explicit contextId for AdminServerApplication

- Add AdminIdInitializer that sets the adminContextId explicitly
Override XD MBean exporters' domain names

- Exclude JmxAutoConfiguration so that Integration MBean exporters defined in configuration classes based on the conditional
expression ${XD_JMX_ENABLED:true} get to set their domain name
  - With this change,
     - the XD container will have MBeans with domain names `xd.parent`, `xd.shared.server` and `xd.container`
     - the XD admin will have MBeans with domain names `xd.parent', `xd.shared.server` and `xd.admin`
     - the XD singlenode will have all the MBeans above
XD-1378b: Remove PPC from twitter*
XD-1378: Update tweet_tests

Property file locations have changed.
XD-1482 initial support for deployment manifest

Currently supports two manifest keys:
  1. module.[modulename].count
  2. module.[modulename].target.group
addressed review comments
added javadoc to loadStream()
using target SpEL expression for container matching
renamed manifest to properties
added WARN for no match, and removed WARN that was accidentally left behind
fixed JobListener compiler error after rebase
flipped (to align correctly) values in log statement