beaker-repo-update: skip symlinked harness repos

Bug: 1132763
Change-Id: Ia2d6d0c4721a523b6fc22f0f393006f26cc79e63
Rename "Remove" button to "Delete Group" button for deleting groups

Bug: 1132729
Change-Id: I9cd561f0eb2345973f59bbdc9189e8a62905e1c6
Record access policy rules removal upon group deletion

Bug: 1132730
Change-Id: Ia185b8773fe16c7cab0129453f8f59ff95f0a05c
Merge branch 'release-0.17' into develop
Automatic commit of release 0.18.0rc1