CFM: Changes in api-server for validation and creating data-base objects for PNF service chaining

[Ankur Tandon]

CFM: Changes in api-server for validation and creating data-base objects for PNF service chaining

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/48086
Submitter: Ankur Tandon (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/48086
Committed: http://github.com/Juniper/contrail-controller/commit/2282548c781d808b98d0ff01613e2f9f0e28e501
Submitter: Zuul v3 CI (<email address hidden>)
Branch: master

commit 2282548c781d808b98d0ff01613e2f9f0e28e501
Author: atandon <email address hidden>
Date: Fri Dec 7 19:11:49 2018 +0000

[DM] - Added API server validation while creating service appliance object
- Added logic to allocate VLAN, each left and right per service instance
- Fix build compilation
- Fix unit tests
- Allocate two internal VN's for management of RT's for left and right service VRF
- Fix VLAN allocation logic for service instance creation
- Fix physical interface ref creation during service appliance creation
- Fix port tuple deletion errors
- Added logic to allocate IRB units for spine device using virtual network ID
- Added logic to create dummy loopback interface for PNF device to be used for
BGP peering on PNF device
- Fix build error
- First clean-up, removing un-wanted code
- Added pre dbe create validation for service instance
- Handled most of Suresh review comments
- Handle Edouard review comments

Closes-Bug: #1807426
Change-Id: I60969f09a4e592d6a7f25d553d5cd4c4df8f859e