Coveralls filters

[natebird]

Add filters to exclude certain folders and files from test coverage.

[coveralls]

Pull Request Test Coverage Report for Build 72

• 0 of 0 (NaN%) changed or added relevant lines in 0 files are covered.
• 6 unchanged lines in 3 files lost coverage.
• Overall coverage increased (+1.5%) to 90.541%

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Files with Coverage Reduction	New Missed Lines	%
test/test_password_expired_controller.rb	1	100.0%
lib/devise-security/rails.rb	2	100.0%
test/test_security_question_controller.rb	3	100.0%

Totals
Change from base Build 69:	1.5%
Covered Lines:	670
Relevant Lines:	740

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💛 - Coveralls