[1075211] Cannot set custom value for Baseline - High property
This really only is a problem when there is not yet a baseline.  Which is
rare and typically just between import and the next run of the DataCalcJob.
It's not really easy to generate a manually set baseline from scratch, so
I'm just taking the approach of better messaging and error handling:
- Fix error handling such that the root cause of the issue is displayed
  when the save fails.
- provide better error handling and provide more specific messaging
- remove the confusing refresh icon (which was sort of acting like a save
  option. So, just hitting return is the way to save.
- Hide the edit box when saving.
- protect against GeneralUnhandledException when saving without setting a
  value.
The PR for BZ1032192 was created with intentional changes against 4.11 but
was merged after the 4.12 release.  Migrate the intential change decls to
the newer version file.
 [BZ 1124614] a few more fixes to merge this change in:
  - fix erroneous comments no longer needed.
  - update unit test for AgentSupported[Build|Version]Test checking.
Bug 1132167 - Tag menu item is visble in JON
[1130085] rhq-server-env.sh.default is overwritten when first upgrade attempt fails
Add FileReverters for the -env files. So, on cancel the unmodified version of
the file should be restored.
Bug 1096332 - All content-related workflows broken on Agent

Create and initialize managers in order

Passes rhq-core-plugin-container tests rhq-core-plugin-container-itest tests.
Passes manual testing of an AS7 resource:
* events
* content
* measurement
* operation
(before and after restart of the plugin container)
JMX Plugin tests enhancements

Abstracted common logic of AS7 and Wildfly8 tests
Added JMX service resource measurement and operation tests for AS7 and Wildfly8

Made measurement and operation tests in JMXPluginTest run on all test JVM Server resources