set dhcp_agent_manager for ovs plugin

related to bug 1131446, makes makes this setting no longer the default,
as doing so broke DHCP for other plugins.

Change-Id: I01ff9e00ba8d416179b485000e69cf3b3908b7bf
Added cinder-backup service (not enabled by default)

cinder-backup service has been added to cinder. This fix adds the
cinder-backup service. To enable this service, c-bak must be added
to ENABLED_SERVICES in the users localrc. To actually perform a
backup the user must enable swift or another service.

Change-Id: If4ef8d78081be572987e7c38c76ff57e82b4f744
Merge "set dhcp_agent_manager for ovs plugin"
Fixes Bug1130377  devstack ldap set values in keystone.conf

Addressed reviewers comments and added some extra properties
needed by latest version of keystone.
This fix sets some needed values in keystone.conf to ensure
that keystone can add entries to LDAP and remain schema
compliant.  It creates a new special role (_member_) that
is needed by the latest version of keystone and also
fixes tenant_id to be tenantId.

Change-Id: Ia2a1ebb7cbedb0af106c74aa9181843cc9739f5d