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
[BZ 1132399] - Plugin config for group has the save button on the top - placing both buttons on the bottom of the page and making them blue
[BZ 1031730] - Dashboard graph group does not retain group configuration - SingleResourceGroupSelector component now pre-selects the group stored in user prefs
[BZ 1127654] - Patternfly theme: various minor UI issues - The height of popups for assigning a server or agent into affinity group was enormous.