Comment 52 for bug 1365824

Reviewed: https://review.opencontrail.org/32511
Committed: http://github.com/Juniper/contrail-controller/commit/e53ad2963b0db706799c15d9c61db9be9a2a50df
Submitter: Zuul (<email address hidden>)
Branch: R4.0

commit e53ad2963b0db706799c15d9c61db9be9a2a50df
Author: Yacine Saibi <email address hidden>
Date: Mon Mar 13 16:13:19 2017 +0100

Patch for IP pool issues:

The problem is when we have more than one api-server, when a subnet is
deleted, the other api-servers keep the subnet allocator in their
subnet_allocator dict (in vnc_db.py). So when we create a subnet with
the same parameters (net, name, cidr,...) when we attach a port to him,
the allocated api is not always in the good range, depending on which
api-server responded to the create-port request.

- net_(delete/update)_notify methods modified,to update dicts on each nodes.

- ipam_(delete/update)_notify modified too.

- new parameter added (notify) now, "IndexAllocator.delete_all"
is done only from "*_req" methods.

- unittests updated to match and test new behavior

Change-Id: I98f095aeca37290c98bf12fb2be57e74b66efa0a
Closes-Bug: #1332645
Closes-Bug: #1365824
(cherry picked from commit f3056c8663be341484468843888ce1646bd5da5d)