Kill oslo-incubator files

They are not used, and just use space. If any of those modules is
needed, just use its version from neutron repo.

Change-Id: I54c92a80e1d61bf7e2f710d3160697c22e2c94f5
VPNaaS: Advanced Services split - unit tests

Enabling test modules, and fixing imports. Able to run unit tests and
PEP8. Had to override policy file to use Neutron's policy.json.

Partially-Implements: blueprint services-split
Change-Id: Iff8d9eea4ea539361da5b5d9c50a9cc78d0b5350
Do not restart vpn processes for every router update

Presently all the vpn processes are restarted when any
router is updated, even if the updated router do not
host any vpn services. 'device_drivers.ipsec.sync()'
updates all the vpn services which results in stopping
and then starting of the vpn processes.
This patch addresses the issue by
1. Passing router id information to the vpnservice_updated
2. (Re)starting the vpn process only if the
      - the vpn service is newly added or
      - the agent has been restarted before the sync or
      - the sync has the router id of the vpn service

Change-Id: I12825bc071033109bdcb93c89daa32012a8babb6
Closes-bug: #1393589
Merge "Kill oslo-incubator files"
Merge "Do not restart vpn processes for every router update"