XD-534 Add shell integration tests for tap
Added tests for tap commands create, deploy and destroy
Added AbstractTapIntegrationTest class that has tap commands execution methods
Fix Tap commands result text
Added util httpPostData method for 'http post'
Added util checkIfCounterExists method for verifying counter existence
Fixed StreamCommandTests & NamedChannelTests to use httpPostData() for 'http post'
Fix executeStreamCreate() to add stream before assertion
Add counter value check to verify the stream with counter sink
- Added counter delete support at CountersController
- Added shell command for "counter delete"
- Updated tests to check for counter value
Move delete() to AbstractMetricsController
Fix review comments to not to override delete at CountersController
Merged Ilaya's branch.
Removed System.out logs
Fix Tap IT by adding a 2s pause for now
fix typo in readme
XD-536 Add Job shell integration tests

* New tasklets to test against.
* Code Cleanup
* Add Trigger tests
* Add adhoc cron tests
* Add adhoc fixedRate tests.
* Update client.xml file to contain fake data.

Jira: https://jira.springsource.org/browse/XD-536
Add dely in NamedChannelTests before creating counter.
XD-563 - fixed Gemfire examples
Fix Table rendering
XD-548 Add 'display' command for Gauge
Add format to gauge display