Tests

Check for upgrade header #413

Job	Run time
lint	1m 39s
test (2.1, gems/rails3.gemfile)	35s
test (2.2)	36s
test (2.3)	1m 43s
test (2.4)	1m 38s
test (2.5)	1m 44s
test (2.6)	1m 41s
test (2.6, gems/typhoeus.gemfile, typhoeus)	1m 38s
test (2.6, gems/octoshark.gemfile)	1m 42s
test (2.6, gems/rails3.gemfile, 1.17.3)	41s
test (2.7)	1m 44s
test (2.7, true)	1m 45s
test (3.0)	22s
test (3.0, true)	20s
test (3.0, gems/instruments.gemfile, instruments)	28s
test (3.0, gems/instruments.gemfile, true, instruments)	27s
test (3.0, gems/sidekiq.gemfile, sidekiq_install)	25s
test (3.1)	27s
test (3.2)	25s
	20m 0s

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