Fix generic handling of NameAlreadyUsedException in GerritCallback

GerritCallback identifies a NameAlreadyUsedException by checking the
exception message. Since commit 7125a01aa2ff66994ceb2903866e75f8ad4f6cb3
the exception message may now include the already used name. Because of
this the check in GerritCallback must be adapted. Make sure that the
already used name is included into the displayed error message.

Change-Id: I27813bca41c6218e7f6ce740b43a8d596c8763b5
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>
6 files changed