add context menu to testviewer for enable/disable#2744

carstenartur wants to merge 2 commits intoeclipse-jdt:mastereclipse-jdt/eclipse.jdt.ui:masterfrom

carstenartur:addContextMenuToTestViewerToEnableAndDisableTestscarstenartur/eclipse.jdt.ui:addContextMenuToTestViewerToEnableAndDisableTestsCopy head branch name to clipboard