Do not assume order of quotas dictionary elements

This fixes the quotas db unit test that breaks with a randomized PYTHONHASHSEED
(see the bug report).

The test assumed that the quotas dictionary from plugin.get_all_quotas() had
elements in a particular order. Found with PYTHONHASHSEED=1235130571.

The fix refactors the test case to handle an unsorted quotas dictionary. Also
choose some different quota limits to make it clearer what is being verified.

Partial-bug: #1348818

Note: There are several other unrelated unit tests that also break with a
randomized PYTHONHASHSEED, but they are not addressed here. They will be
addressed in separate patches.

Change-Id: I3892b51082629e6ebce175f64f501717741baa37
Updated from global requirements

Change-Id: I9865d4d0cdd475638ca49b0588ba880a52ee8897
Add a tox test environment for random hashseed testing

The newer versions of tox by default enable a random PYTHONHASHSEED. However,
this breaks many Neutron unit tests, so PYTHONHASHSEED=0 is currently hard-
coded for Neutron's unit test environments.

We want to clean up the unit test cases that break with a random hashseed
(there are many). To be able to find the broken tests and then verify them,
we need to have an easy way of enabling random hashseed testing.

Partial-bug: #1348818

Change-Id: I51f05cdfa9f8728baabaf315b71e5defb26426b1
ofagent: Desupport ancillary bridges

Remove code to report port status for ancillary bridges because
it relies on ovsdb.  While we could adapt the code to use OFP in
a similar way we did for the integration bridge, it doesn't worth
the effort because the almost same functionality can be achieved
using provider network.  Update README to suggest the use of
provider network.

Partially-Implements: blueprint ofagent-port-monitor
Change-Id: Ia1329e36755b3e9a479a115dbd08aa3f4d6b55df
Merge "Do not assume order of quotas dictionary elements"
Merge "Updated from global requirements"
Merge "Add a tox test environment for random hashseed testing"
Merge "ofagent: Desupport ancillary bridges"