Ensure ofagent unit tests handles random hashseeds

Several tests in test_ofa_neutron_agent.py and test_ofa_flows.py fail when
running the unit tests with hashseed 2701526934.

This patch fixes the failing unit tests by specifying that assert_has_calls does
not need to assert any order.

Change-Id: I48d6601130f7de1f6eeb7333a17eddd82e7acbdf
Partial-Bug: 1348818
Remove duplicate import of constants module

.. and enable corresponding pylint check now the only offending instance
is fixed.

Change-Id: I35a12ace46c872446b8c87d0aacce45e94d71bae
Big Switch: Switch to TLSv1 in server manager

Switch to TLSv1 for the connections to the backend
controllers. The default SSLv3 is no longer considered
secure.

TLSv1 was chosen over .1 or .2 because the .1 and .2 weren't
added until python 2.7.9 so TLSv1 is the only compatible option
for py26.

Closes-Bug: #1384487
Change-Id: I68bd72fc4d90a102003d9ce48c47a4a6a3dd6e03
Merge "Ensure ofagent unit tests handles random hashseeds"
Merge "Remove duplicate import of constants module"
Merge "Big Switch: Switch to TLSv1 in server manager"