Updated openstack/openstack
Project: openstack/neutron  4e199a7f162b02980d88e9f94ba8f770cfdae2fe
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Add request timeout handling for Mellanox Neutron Agent

Add request timeout handling for messages sent to eswitch Daemon.
Using configurable number of retries and increasing waiting interval
between retries resend the message.
If request timeout persists, eswitch daemon is not reachable.
In such case, exit the agent process.

Closes-Bug: #1228827

Change-Id: If1290bedafe7a0dd8a61cbe328510075edeb1e5b
(cherry picked from commit 793c76344715790531d39436508b188b536e2ff5)