beaker-wizard: escape metachars in Makefile echo statements

Bug: 1165754
Change-Id: Ic6c5c782156cf8dffdf30c651ef3a0d6dc58fddb
beaker-wizard: exclude RHEL4 and RHEL5 from new tests by default

Bug: 1131429
Change-Id: Iae112a2730d33d4f9cc9883af8b89abe140caf0e
prevent error boxes from stacking up in system page modals

Bug: 1161373
Change-Id: I59a468fb203ee650afb8e2f8848f99920ab89cff
fix typo in handling of <device op="!="/>

Bug: 949855
Change-Id: If5418a49887e91e7cb6a37fb281dfe8fe87d93b2
workaround for line-height scaling in system tab nav list

Bug: 1163721
Change-Id: Ie6f7e72b88d284a7fd57ffc53b98fb81d4422f15
fix error handling path for non-existent job owner

Bug: 1140912
Change-Id: Idae9dab5386caf7653aa79acd85d027377b3a8f7
better error handling for bkr list-systems --xml-filter

Bug: 1167164
Change-Id: I11125dca2d7481293cfb085bd5da93aa0168e936
bkr list-systems --host-filter

Bug: 1118523
Change-Id: I423bf365eeffe7a2c78558756e381988b26109d4
Merge branch 'release-19' into develop