change-tempest-tests-to-not-use-deprecated-properties

In the stack trace of tempest test run, following message is output:

2015-10-23 05:19:22.038 | 2015-10-23 05:19:22.038 | InsecurePlatformWarning
2015-10-23 05:19:22.040 | 2015-10-23 05:19:22.039 | 2015-10-23 05:19:21.456 9531 INFO tempest [-] Using tempest config file /etc/tempest/tempest.conf
2015-10-23 05:19:22.041 | 2015-10-23 05:19:22.041 | 2015-10-23 05:19:21.461 9531 WARNING oslo_config.cfg [-] Option "alt_password" from group "identity" is deprecated for removal. Its value may be silently ignored in the future.
2015-10-23 05:19:22.043 | 2015-10-23 05:19:22.043 | 2015-10-23 05:19:21.461 9531 WARNING oslo_config.cfg [-] Option "alt_tenant_name" from group "identity" is deprecated for removal. Its value may be silently ignored in the future.
2015-10-23 05:19:22.045 | 2015-10-23 05:19:22.044 | 2015-10-23 05:19:21.462 9531 WARNING oslo_config.cfg [-] Option "alt_username" from group "identity" is deprecated for removal. Its value may be silently ignored in the future.
2015-10-23 05:19:22.046 | 2015-10-23 05:19:22.046 | 2015-10-23 05:19:21.462 9531 WARNING oslo_config.cfg [-] Option "password" from group "identity" is deprecated for removal. Its value may be silently ignored in the future.
2015-10-23 05:19:22.048 | 2015-10-23 05:19:22.048 | 2015-10-23 05:19:21.462 9531 WARNING oslo_config.cfg [-] Option "tenant_name" from group "identity" is deprecated for removal. Its value may be silently ignored in the future.
2015-10-23 05:19:22.049 | 2015-10-23 05:19:22.049 | 2015-10-23 05:19:21.462 9531 WARNING oslo_config.cfg [-] Option "username" from group "identity" is deprecated for removal. Its value may be silently ignored in the future.

We need to change the tests to not use these deprecated attributes.