Allow to pass RSpec options to Test::Instance::Any
This addresses https://gitlab.com/gitlab-com/migration/issues/616 by allowing the Test::Instance::Any
scenario to receive RSpec options.
For instance, this will allow to split manually the test suite to run it in "parallel":
› bin/qa Test::Instance::Any gitlab/gitlab-ee 11.0.2-ee https://staging.gitlab.com -- qa/specs/features/project/
› bin/qa Test::Instance::Any gitlab/gitlab-ee 11.0.2-ee https://staging.gitlab.com -- qa/specs/features/merge_request/
# etc.
This is obviously a very first/boring step as we'll have to make sure all the scenarios are actually run.