In vancouver summit, it was decided that 'project-access' flag is more
clear than 'creator-only' flag mentioned in spec. The renamed flag
more clearly reflects the intended behavior associated with this flag.
As part of this change, following changes have been.
Column renamed in secret_acls and container_acls tables.
Updated existing creator_only flag values as now project_access flag
is negation of existing flag value.
Updated model as now default project_access value is True.
Updated controller logic to reflect default change.
Updated policy to reflect expected flag value.
Modified all tests to reflect flag rename and expected reverse value.
Updated ACL docs to reflect flag rename
Change-Id: I67942ed3efb1918c04efaff7ce31156750cb4207
b46302077c