GUI: fix back buttons in DRBD wizard
tests: fix DRBD tests
cleanup: non functional changes
GUI: fix "next" button not being enabled in DRBD wizard
GUI: fix deadlock while applying of global DRBD config
rename data/ConfigData to data/Application
cleanup: white space change
cleanup: change test/live flag boolean to enum
fix possible lock up during parameter check
fix possible npe in CRM Graph

java.lang.NullPointerException

null
lcmc.gui.CRMGraph.getHbConnections(CRMGraph.java:292)
lcmc.gui.resources.GroupInfo.getSubtextsForGraph(GroupInfo.java:891)
lcmc.gui.CRMGraph.getSubtexts(CRMGraph.java:1806)
lcmc.gui.ResourceGraph$MyPluggableRenderer.paintShapeForVertex(ResourceGraph.java:1421)
add tool tips to the "Next" wizard buttons
fix apply button being disabled