Support checking for su user to atomic_move

Fixes #7553
template.py: Handle purposely raised exceptions in lookup()

If a lookup plugin is run by the lookup() template method it should pass
along any AnsibleError (or child exception classes) rather than just eat
them.  These exceptions are purposely raised by the plugin.
updating example, to be more consistent with parameter names
Return untouhced servers with exact_count
Fix error when using os.getlogin() without a tty
Don't use deprecated BaseException.message in keystone_user

fixes error "failed to parse: <attribute 'message' of 'exceptions.BaseException' objects>
TypeError: <attribute 'message' of 'exceptions.BaseException' objects> is not JSON serializable"
Fix typo in CHANGE MASTER TO syntax
Add primary group in the first user module doc example
Merge and intersect lists without using sets.

Using sets for these operations is dangerous because sets cannot contain
certain object types (such as lists) and their iteration order is
undefined.

Fixes #7596
Ensure there are no duplicates in the merged/intersected lists
Add rackconnect and managed cloud automation check examples