Fixed UpdateTable action documentation

* Marked as reserved for future
* Removed stubs

Partially implements: bp magnetodb-documentation

Change-Id: I172dd567adc6495f88875abe19abdb6b15ee93e3
Moves passing tempest tests to stable directory

Implements bp: review-tempest-tests
Change-Id: I042d93861334c27f2695e0e87681ed2ea9088359
Fix cassandra tests hanging up

Change-Id: Ia181bf3974f3121cf5ce51bfdbbe949a99161b0d
Merge "Moves passing tempest tests to stable directory"
Merge "Fixed UpdateTable action documentation"
Merge "Fix cassandra tests hanging up"