Fix L3 HA network creation to allow user to create router

Update HA Network creation to use an admin context to allow Neutron
to create the tenant-less network required for the HA router when
it does not yet exist and is being created by a non-admin user.

Neutron creates these resources without a tenant so users cannot see
or modify the HA network, ports, etc.  Port creation and association
already use elivated admin contexts to allow their function when
an user attempts to create a HA L3 router.

Conflicts:
        neutron/tests/unit/db/test_l3_ha_db.py

Change-Id: I36166158a0970b8d08d6702054b11a43fb684281
Closes-Bug: #1388716
(cherry picked from commit cc9bc24229f1d79dc99303db1affc03c030c011e)
Remove openvswitch core plugin entry point

The openvswitch core plugin has been removed but not its associated
"neutron.core_plugins" entry point. This change removes it from
setup.cfg.

Change-Id: I79f7c334cdeb0f4d0d68743734f69c0ec8523467
Related-Bug: #1323729
Closes-Bug: #1391326
(cherry picked from commit f36c29903afb713670f9e7c3f9530e117dfc6bcb)
rootwrap config files reference deleted quantum binaries

dhcp and l3 rootwrap filter files contain reference to the deleted
binary quantum-ns-metadata-proxy. This change removes these obsolete
filters.

Change-Id: Iad4772752d74a1c0535144b5faf9a1f8ae89f6a3
Closes-Bug: #1391256
(cherry picked from commit 226c4f6d809de3d6ed622a1f90b06e34506696d6)
Fix KeyError in dhcp_rpc when plugin.port_update raise exception

KeyError exception is seen because of following reasons

* DhcpRpcCallback._port_action() is called by two functions
   -  DhcpRpcCallback.create_dchp_port()
   -  DhcpRpcCallback.update_dhcp_port()

* When create_dhcp_port() function calls _port_action(), the
  function argument 'port' will have the body as
  {'port': {'network_id': foo_network_id, 'fixed_ips': [..] ...}

* When update_dhcp_port() function calls _port_action(), the
  function argument 'port' will have the body as
  {'id': port_id, 'port': {{'port': {'network_id': foo_network_id,
			            'fixed_ips': [..] ...}}

* If an exception occurs when _port_action() calls plugin.create_port(),
  network id is accessed as
  net_id = port['port']['network_id']

* If an exception occurs when _port_action() calls plugin.update_port(),
  network id is accessed as
  net_id = port['port']['network_id']
  which is causing the KeyError. network_id should have been accessed as
  net_id = port['port']['port']['network_id']

This patch fixes the issue by making the _port_action() take the
same port body. update_dhcp_port() insteading of passing the port_id
and port information in a single argument, it now adds port_id
in the port body itself.

Change-Id: I70b92fa20b421b05ca2053a9a57f62db726f7625
Closes-bug: #1378508
(cherry picked from commit 7ea605df3ac71dc568194bcd5eaf1c115008e1ee)
Merge "Fix L3 HA network creation to allow user to create router" into stable/juno
Merge "rootwrap config files reference deleted quantum binaries" into stable/juno
Merge "Fix KeyError in dhcp_rpc when plugin.port_update raise exception" into stable/juno