CLOUDIFY-2073 generate unique id even for 1 instance, only supported when nodes that get connected to are single (1 instance)
CLOUDIFY-2073 add missing transformation to policies part of plan
always update target_id in case of contained_in
CLOUDIFY-2073 for now treat depends_on relationship with the same semantics of connected_to
CLOUDIFY-2073 add comments and rename some methods
Merge pull request #3 from CloudifySource/feature/CLOUDIFY-2073-random-ids-1-instance

Feature/cloudify 2073 random ids 1 instance