use high cpu, and build container in parallel

[gfr10598]

Speed up etl builds by using high cpu build machine, and allowing docker container to build in parallel with unit tests.

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This change is 

[coveralls]

Pull Request Test Coverage Report for Build 7312

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.07%) to 65.309%

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Totals
Change from base Build 7292:	0.07%
Covered Lines:	3976
Relevant Lines:	6088

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💛 - Coveralls

[stephen-soltesz]

This seems like a good idea. Merged branch with HEAD to confirm it WAI in sandbox.