Remove unused plug-ins in dependencies

Change-Id: I43f5cbc6cdaaa7ffb37c1f961008260dafb6f540
Signed-off-by: Denis Knoepfle <denis.knoepfle@sap.com>
Fix broken paths to resources

Adjusted the path to be in accordance with the path generated by
ResultManager.

Change-Id: If01b00c9f61afdfd73ea75361c3a526e73289231
Signed-off-by: Denis Knoepfle <denis.knoepfle@sap.com>
Fix display message on diagnosis failure

When the diagnosis fails, an according error message is displayed now.
Maybe the text of the error message should be polished more.

Change-Id: Ie0c4ecc91ff8c164f752644979072a8c8f9a13bc
Signed-off-by: Denis Knoepfle <denis.knoepfle@sap.com>