Remove v1 logic from etl packages: fake, bq, and related tests

[stephen-soltesz]

This change completes a TODO from #1080 in the worker_test.go to use a fakestorage server to make what was previously an "integration" test a standard, in-memory unit test.

This change also removes two packages that are now unnecessary:

• bq - which managed inserts into BigQuery tables, via a Put() method
• fake - which implemented an in-memory interface of the bq package's Put() method for unit tests.

Part of:

• Remove v1 pipeline logic from data pipeline #1084

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This change is 

[coveralls]

Pull Request Test Coverage Report for Build 7320

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.7%) to 65.542%

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Files with Coverage Reduction	New Missed Lines	%
active/active.go	2	90.63%

Totals
Change from base Build 7318:	-0.7%
Covered Lines:	3631
Relevant Lines:	5540

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💛 - Coveralls

[cristinaleonr]

Reviewable status: complete! 1 of 1 approvals obtained