Floating IP and service chaining do not work together

[Nischal Sheth]

If a VN from which a floating-ip pool is created also has one or more
service chains starting/terminating on it, the floating IP functionality
may not work correctly.

The problem is that the VN will have more than 1 RI and agent code
does not have sufficient information to pick the default RI/VRF for
route lookup when using the FIP. Forwarding will not work correctly
if it happens to pick one of the service RIs.

Proposal is to implement the following:

- Add property to RI in schema to indicate if it's default RI for VN
- Default value of this new property is False
- Schema transformer sets property to True for default RI
- Agent uses property to find default RI/VRF for FIP processing
- Agent ignores a FIP if there's no default RI associated with VN

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/4737
Committed: http://github.org/Juniper/contrail-controller/commit/82ec61525ba153b1fb4dd527fde7db5e41ac8785
Submitter: Zuul
Branch: master

commit 82ec61525ba153b1fb4dd527fde7db5e41ac8785
Author: Sachin Bansal <email address hidden>
Date: Tue Nov 18 16:51:52 2014 -0800

Add a new property to routing instance to indicate that it is a default routing instance for the network

Change-Id: I7f36587045c0ad0257a8f3e63cef3fa28775c82d
Partial-Bug: 1380750

[Sachin Bansal (sbansal)]

Added a new property to routing instance to indicate that it is default RI or not. Assigning to Hari for agent implementation.

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/12772
Submitter: Kumar Harsh (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/13213
Submitter: Kumar Harsh (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/13213
Committed: http://github.org/Juniper/contrail-controller/commit/5b1e9ca3a3d812424c0e82c36eed20eaa964643a
Submitter: Zuul
Branch: master

commit 5b1e9ca3a3d812424c0e82c36eed20eaa964643a
Author: harsh <email address hidden>
Date: Thu Aug 20 14:57:51 2015 +0530

Use default ri/vrf for fip processing by looking at is_default property of ri.
Add UT for same .

Change-Id: I443916b9c3ff31d21b818d1ec1c8686b4f3736ae
Closes-Bug: #1380750