Add support for dnsmasq version 2.48

Following the bug fix for bug 1170793 we are able to add
in support for dnsmasq versions that do not support tags.

2.48 is the version shipped in RHEL 6.4

Change-Id: Ia7d2b1c0adb477159ce146bcd4323d4b2795bff5
fix reference to tenant id.

Administrator can create resource, even if the tenant of resource is
different from the one of authentication. For example, administrator
can operate 'quantum net-create' command with different tenant
between the authentication tenant(--os-tenant-name) and --tenant-id.

In this case, quota cannot be restricted with the resource tenant,
because it is restricted with --os-tenant-name.

This patch fixes this problem.

Fixes: bug #1179729

Change-Id: I8ce893bb583d52f81c661082372d725bebf9c1be
Imported Translations from Transifex

Change-Id: Ia41af63051b2a8cc7aa898a44d5fb44905e2e448
Merge "fix reference to tenant id."
Merge "Add support for dnsmasq version 2.48"
Imported Translations from Transifex

Change-Id: I85fd554f5181991c77b415764ebc6e032ef83fac
Docstrings formatted according to pep257

Bug #1020184

quantum/*

Change-Id: I771e0f0d6121b7c03cecd82583e9a6c1915f891d
Merge "Docstrings formatted according to pep257"