The install-grinder test report the following error in log:

No property tester contributes a property com.google.gdt.eclipse.suite.isLaunchTarget to type class org.jboss.tools.central.editors.JBossCentralEditorInput

They're testing installation of JBT from http://download.jboss.org/jbosstools/discovery/nightly/core/4.1.kepler/ and then they try to install all components from Central using the catalog http://download.jboss.org/jbosstools/discovery/nightly/core/4.1.kepler/jbosstools-directory.xml . Does anyone have a clue of the criticity of this error?

This seems related to https://bugs.eclipse.org/bugs/show_bug.cgi?id=410647