Remove absolute path in KillFilter for metadata-proxy

This commit fix the problem of killing neutron-ns-metadata-proxy
when running in Virtual Environment.

Change-Id: I987dd87e19c218846a48e58b61679b4153d97f66
Closes-bug: #1363773
Avoid auto-scheduling for distributed routers

The reason for this is twofold:

- It may relieve contention on DB access while
  both servers and l3 agents are busy setting up
  and syncing routers down respectively.

- It prevents accidental placement of namespaces
  during the L3 sync_routers process, as auto
  scheduling without taking into account the state
  of the L3 agents, as well as the state of the
  routers being processed, may overrule the placement
  decision made during router operations.

Partial-bug: #1356121
Partial-bug: #1359326

Change-Id: Ia677ce212145d6cee65adeb1d8ae594e6ac5e34d
NSX: Correct allowed_address_pair return value on create_port

This patch fixes the NSX plugin to return [] rather than None for a
port does not have any allowed_address_pairs when a create_port api
call is made. Currently the NSX plugin is failing every patch because
now tempest is checking for this value to be [].

Change-Id: Ic82c564ff62000c367c544f44a76694be9375790
Closes-bug: 1366921
Remove second call to get_subnets in delete_subnet

delete_subnet made calls to both get_subnet and _get_subnet,
get_subnet uses _get_subnet so multiple database requests were being
made, this patch removes the call to get_subnet and directly calls
_make_subnet_dict using the result of _get_subnet

Change-Id: I9982821dbb9447e35a4b6e50bc5ad31cec417ca5
Closes-Bug: 1366056
Fix comments in api.rpc.handlers

Follow-up patch of RPC refactoring of bug 1359416.
It addresses minor comments in the above patch series.

Change-Id: I2d6268db777f0f73fda61a5a7d0967a91bcb292b
Closes-Bug: #1359416
Merge "Avoid auto-scheduling for distributed routers"
Merge "Remove second call to get_subnets in delete_subnet"
Merge "Fix comments in api.rpc.handlers"
Merge "NSX: Correct allowed_address_pair return value on create_port"
Merge "Remove absolute path in KillFilter for metadata-proxy"
Merge branch 'master' of https://github.com/openstack/quantum