test

Merge pull request #1112 from weaveworks/837-branch-planner-unit-test #1990

Job	Run time
Internal Tests	2m 41s
Controller Tests: Non-numbered	2m 34s
Controller Tests: 10->29 / targeted-test	2m 44s
Controller Tests: 1xx / targeted-test	4m 27s
Controller Tests: 2xx / targeted-test	4m 17s
Controller Tests: 30->59 / targeted-test	3m 9s
Controller Tests: 60->99 / targeted-test	2m 54s
Controller Tests: 3xx / targeted-test	3m 8s
Controller Tests: 99xx / targeted-test	4m 38s
	30m 32s

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