Make MidoNet plugin code more testable

Refactor plugin.py and midonet_lib.py to improve unit testing of
the MidoNet plugin.  Make all the tests pass in the plugin except
those that test features that are not currently supported by the
plugin, which are IPv6 and multiple subnets per network.
Consolidate the mocking code in mock_lib.py to be shared by
plugin.py and midonet_lib.py.

Change-Id: Idcdfc3d90d5ec9e0be29bb6833d336af596fe363
Fixes: bug #1133215
Signed-off-by: Ryu Ishimoto <ryu@midokura.com>
Signed-off-by: Tomoe Sugihara <tomoe@midokura.com>
Fix typo

Change-Id: I83bdbd5d58a217d616bb2bb68f82ef6586d7b715
Add L3 resources to policy.json

This patch adds the l3 resources to policy.json. I tested changing the
rule to rule:admin_only for all the resources added and they were
enforced as expected.

Fixes bug 1186077

Change-Id: Ib5e2879165d9dc6416be4c96c62d6e49452d3be5
Imported Translations from Transifex

Change-Id: I9ad53953b1902c2538fe6888773ea0d7811371d3
Sphinx-ify QuantumPluginBaseV2 docstrings

The quantum.quantum_plugin_base_v2 module had some good docstrings,
but there was no corresponding sphinx code that would generate
docs from them. There were also some syntax issues with the
sphinx markup in the docstrings.

This change adds sphinx directives so these docs will be auto-
generated. It also modifies the docstrings in the QuantumPluginBaseV2
methods so they are parsed by the Sphinx documentation generator
without any errors.

If this patch is accepted, a "Plugin API" link to these docs
will appear at

http://docs.openstack.org/developer/quantum/

Fixes bug 1186255

Change-Id: I96eddcc516d109766d7f4c52edd595748696b595
Merge "Fix typo"
Merge "Make MidoNet plugin code more testable"
Merge "Imported Translations from Transifex"
Merge "Add L3 resources to policy.json"
Merge "Sphinx-ify QuantumPluginBaseV2 docstrings"