The group name is missing if there is no group backend that can resolve
the UUID. This can e.g. happen if the singleusergroup was used and
single user groups have been added to Gerrit groups, but then the
singleusergroup plugin was uninstalled so that the single user groups
can no longer be resolved.
Change-Id: I1bccec4bb38b55f6ad9b2d2ac83227b379d09071
Signed-off-by: Edwin Kempin <ekempin@google.com>
92f58f80b1