SCAL-1000: Require test environment on rake test:all
SCAL-1000: Require test environment on rake test:all

Previously, rake test:<task> could work with environment other than test (except production), sometimes causing to use development database instead of test database, if not explicitly setting RAILS_ENV.

Scalarm/scalarm_experiment_manager,Scalarm/scalarm_experiment_manager,Scalarm/scalarm_experiment_manager,Scalarm/scalarm_experiment_manager,Scalarm/scalarm_experiment_manager