Complete remainder of automate component workflow
mgmt_system fixtures have a new home

- They're in the fixtures dir now
moved the order of field completion to allow UI to update hidden fields
selenium fixture now supports navigation fixtures
ssh_client fixture, updated/expanded ssh utils

- Needs a change to credentials.yaml, see credentials.yaml.template
- Tests!
Add support for scp
Tell ssh client not to look for keys
Fix ssh_client_run_command test Assert.contains.
added ldap_config fixture, updated cfme_data, added use of fixture in roles test