Tests

Allow manual trigger of tests #1285

Job	Run time
Build bloomberg-comdb2 from source	4m 38s
Build python-comdb2 source distribution	43s
Test suite (3.14)	49s
Test suite (3.15-dev)	46s
Test suite (3.10)	1m 7s
Test suite (3.9)	49s
Test suite (3.11)	1m 2s
Test suite (3.8)	45s
Test suite (3.12)	52s
Test suite (3.13)	51s
	12m 22s

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