Mark reservation_id, config_drive as implemented

In OS::Nova::Server these are actually implemented and should
work fine.

Change-Id: I975fc180e3ee9f8e339c655cf410d56892b23e03
Closes-Bug: #1226774
Nested stack derive requires_deferred_auth from resources

StackResource requires_deferred_auth needs to determine
its value from the requires_deferred_auth of the nested
stack.

Change-Id: I206390b3f2fe099d88f255bdff81d2abe2496333
Closes-Bug: #1223054
Merge "Mark reservation_id, config_drive as implemented"
Merge "Nested stack derive requires_deferred_auth from resources"