[xtend][ide] Fixed notification from Xcore

see https://bugs.eclipse.org/bugs/show_bug.cgi?id=452094

Conflicts:
	plugins/org.eclipse.xtend.core/src/org/eclipse/xtend/core/resource/XtendResourceDescriptionManager.xtend
	plugins/org.eclipse.xtend.ide/src/org/eclipse/xtend/ide/XtendUiModule.java

Change-Id: I65e54e7fdfb9479127966930cf09233f7af715bc
collect intellij plugins in one directory
Merge "collect intellij plugins in one directory"
Merge "[xtend][ide] Fixed notification from Xcore"
add updatePlugins.xml to intellij repository
Merge "add updatePlugins.xml to intellij repository"