PLUMgrid quantum plugin

PLUMgrid plugin supports Quantum Core V2 APIs over an infrastructure running
PLUMgrid Network Virtualization Platform.
The plugin will interact directly with the Hypervisor layer to provide all the
networking functionality requested by Quantum APIs.
It will be based on a controller-mode implementation were all resources state
will be controlled and handled by the plugin.

Implements: blueprint plumgrid-quantum-plugin
Change-Id: I6bc8d32b83982e10f661913e85494468cf10e0e2
Mark password config options with secret

Config object supports masking values when writing out if the secret
flag is set on the option definition.  This change flags all quantum
options containing a password.

Change-Id: I68d9bf80c673acc72db22dc2c6907ee180dcc605
Imported Translations from Transifex

Change-Id: I207276c5598bcf01cc2775727b5290f4fd52c5f9
Merge "Mark password config options with secret"
Merge "Imported Translations from Transifex"
Merge "PLUMgrid quantum plugin"