tests

rake task for fixing mit sample links to assays #6618

Job	Run time
Tests (mysql, rails test test/unit)	25m 47s
Tests (mysql, rails test test/functional)	36m 37s
Tests (mysql, rails test test/integration)	17m 56s
Tests (mysql, rspec spec)	2m 58s
Tests (mysql, rake assets:precompile)	3m 39s
Tests (mysql, rake db:setup)	3m 15s
Tests (mysql, rake db:migrate)	3m 26s
Tests (mysql, rake seek:upgrade)	3m 15s
Tests (sqlite3, rails test test/unit)	20m 39s
	1h 57m 32s

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