Merge pull request #381 from myermo/dockerfile-fix #1118

Job	Run time
build-libs	56s
build-boost	38s
Helios-PyBinds (Python3.6)	34m 42s
Helios-PyBinds (Python3.7)	37m 13s
build-helios-pybinds-dynamic	51m 6s
Helios-PyBinds (Python3.8) - separate	38m 16s
Helios-PyBinds (Python3.8)	37m 24s
Helios-PyBinds (Python3.9)	43m 9s
Helios-PyBinds (Python3.10)	42m 11s
run-testcases	9m 38s
	4h 55m 13s

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