Fix key-value CSV import for non-existent systems

Bug: 1058549
Change-Id: I0d7e6a91a57b70bc6a4e52e47e8de1f3833e8ac7
tests: allow tests to pass a group display_name

Used by beaker-server-redhat tests.

Change-Id: If0b390b3f2cd9f7f1ba99a76847b6ab252929f1a
anamon: Monitor and upload /tmp/anaconda-tb-* files

Bug: 1057148
Change-Id: Ic583b60c0595589dc379f8184735f944b0a25074
Always closed failed XML-RPC connections in LC

Bug: 1059079
Change-Id: Ia641523a2b6f633a70c16aaedc37013cc48296a2
Merge branch 'release-0.15' into develop

Conflicts:
	Server/bkr/server/CSV_import_export.py