JBIDE-13777 There is no error message in log if palette xml is broken

Error message is logged, including resource name and xml error.
Test is added.
JBIDE-14092 Updated parent pom version for Beta1 (jbosstools-base)
JBIDE-14095 Full path to the opened file instead of a workspace related path

XModelObjectEditorInput.getToolTipText() is modified
to return for a file the same result as FileEditorInput.