Remove old policies from policy.json

They're confused, misleading, and most importantly unused.

Change-Id: I22130ce3147617f8fb7baba7a50bada128d40e08
Closes-Bug: #1362618
Introduces a keepalived manager for HA

This patch introduces a keepalived manager
which will be used for the blueprint
blueprint l3-high-availability.

The manager can create a keepalived.conf compliant configuration,
start, stop and restart the service, as well as create keepalived
notification scripts.

Implements: blueprint l3-high-availability
Change-Id: I1ba9f332778f27de950d9e97d4fb4a337f6f26da
Co-Authored-By: Assaf Muller <amuller@redhat.com>
Apic drivers enhancements (second approach): L3 refactor

- refactor to leverage Client's transactional capabilities
- General refactor to improve the driver's reliability

Implements blueprint: apic-driver-enhancements

Change-Id: I5a19039e82988a0570622bc1ddb1429e9833d478
Apic drivers enhancements (second approach): Sync

    - Model synchronization

Implements blueprint: apic-driver-enhancements

Change-Id: I4264afe5c140c3576951c1a5a28a8d7666481147
ofagent: merge br-tun into br-int

Highlights:
- Deprecate br-tun.
- Reduce the use of OFPP_NORMAL action.  Use mac address info
  obtained from get_device_details and l2-pop to reduce flooding.
- Use OpenFlow metadata instead of "internal" VLANs.
  Now tenant networks are VLAN transparent.

Implements: blueprint ofagent-port-monitor
Implements: blueprint ofagent-merge-bridges
Change-Id: I21ee1c6d141863182b487e10c7bfe911b1a472ab
ofagent: Enable local arp responder for local VMs

Because ofagent makes every arp requests packet-in and
perform packet-out anyway, just make it respond arp requests
for local VMs.  It would be simpler and more effective than
forwarding requests to the network as it did before this change.

Before this change:
    request: src VM -> switch -> controller -> switch -> target VM
    reply: target VM -> switch -> src VM

After this change:
    request: src VM -> switch -> controller
    reply: controller -> switch -> src VM

As a bonus, now we can test l2pop and local arp responder with
a single node setup, at least for some extents.

Related: blueprint ofagent-l2pop
Related: blueprint ofagent-merge-bridges
Change-Id: I606a238d8c2021ed908fbd89d3488768497f57c5
Merge "Apic drivers enhancements (second approach): L3 refactor"
Merge "ofagent: merge br-tun into br-int"
Merge "ofagent: Enable local arp responder for local VMs"
Merge "Introduces a keepalived manager for HA"
Merge "Apic drivers enhancements (second approach): Sync"
Merge "Remove old policies from policy.json"