Tests

Allow manual trigger of tests #1286

Job	Run time
Build bloomberg-comdb2 from source	4m 28s
Build python-comdb2 source distribution	33s
Test suite (3.14-dev)	50s
Test suite (3.11)	1m 2s
Test suite (3.12)	1m 3s
Test suite (3.9)	1m 1s
Test suite (3.8)	45s
Test suite (3.10)	54s
Test suite (3.13)	1m 6s
	11m 42s

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