Moving identity panels to their own dashboard.
RBAC is now used to determine the data to load in the identity
dashboard. Using the default policy file, a user with role member
will now be able to see their project list.
Also, adding a policy check mechanism at the panel and dashboard
level to determine which panels and dashboards the user can access.
Implements blueprint separate-identity-dash
Change-Id: I7ebfec2bf6e44899bec79d3b23c90d56a976200f