Fixed the test name of ec2api tempest tests
Fixed the test name of ec2api tempest tests

* Due to tempest plugin split goal, the test path
  ec2api.tests.functional is moved to ec2api_tempest_plugin
  in new repo. Since python-ec2api-tempest-plugin is packaged in
  RDO, let's consume it.
* https://review.rdoproject.org/r/11292

Change-Id: Iab207122705cb91de57f852520101f6b35b4cbca

openstack/puppet-openstack-integration,openstack/puppet-openstack-integration,openstack/puppet-openstack-integration