Added find_by_name to openstack identity-users model and tests
[aws|iam] Add get_account_summary.
Merge pull request #2679 from dpiddy/aws-iam-get-account-summary

[aws|iam] Add get_account_summary.
Merge pull request #2673 from anynines/openstack_find_user_by_name

Added find_by_name to openstack identity-users model and tests