tests

Revert "Use ActiveSupport's Testing TimeHelpers" #556

Job	Run time
Tests (mysql, rails test test/unit)	24m 28s
Tests (mysql, rails test test/unit)	24m 28s
Tests (mysql, rails test test/functional)	35m 33s
Tests (mysql, rails test test/functional)	35m 33s
Tests (mysql, rails test test/integration)	18m 20s
Tests (mysql, rails test test/integration)	18m 20s
Tests (mysql, rspec spec)	2m 55s
Tests (mysql, rspec spec)	2m 55s
Tests (mysql, rake assets:precompile)	3m 24s
Tests (mysql, rake assets:precompile)	3m 24s
Tests (mysql, rake db:setup)	3m 23s
Tests (mysql, rake db:setup)	3m 23s
Tests (mysql, rake db:migrate)	3m 14s
Tests (mysql, rake db:migrate)	3m 14s
Tests (mysql, rake seek:upgrade)	3m 24s
Tests (mysql, rake seek:upgrade)	3m 24s
Tests (postgres, rails test test/unit)	25m 21s
Tests (postgres, rails test test/unit)	23m 41s
Tests (sqlite3, rails test test/unit)	19m 50s
Tests (sqlite3, rails test test/unit)	19m 50s
	4h 38m 4s

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