Fixes RHEL4 import problems

Bug: 974382
Change-Id: I4e6485f65da25d1c05f1fb85959604caa51ab5e3
Automatic commit of package [beaker] release [0.13.1-1].
Add maintenance update notes for 0.13.1

Change-Id: I54f963fe6248aec29215f922d26c2b7561201675
test fix for test_rhel4_tree_import_compose
fix default value for --clients and --servers in workflow commands

Bug: 972417
Change-Id: I7abe98a983d8ef5015fd9fed48b5482b972f59f2
report a nicer error when job XML is not valid UTF-8

Bug: 972412
Change-Id: Iac5cac50e7a04e02bb14b3e48fcb8f70c0364951
Slow metrics monitoring

Change-Id: I51d72e1b1a7a847957609298546690226be2da98
%end %packages only when it is defined.

Bug: 957011
Change-Id: Id1b58b882109a204056cb71da4e907eec072c74f
Merge "Slow metrics monitoring" into release-0.13
Merge "%end %packages only when it is defined." into release-0.13
Rewrite this test to test only the minimal criteria required to verify the test
Merge "report a nicer error when job XML is not valid UTF-8" into release-0.13
Merge "fix default value for --clients and --servers in workflow commands" into release-0.13
Merge branch 'release-0.13' into develop