Imported Translations from Transifex

Change-Id: I5bcbd94a8df99b5fe3125e1dee45cfceeeb29ac6
Replace occurences of 'test_tenant' with 'test-tenant' in tests

tenant_id will now be consistent among all resources created.
This is important when getting or listing resources by tenant_id.
Most resources are created under the 'test-tenant', while
metering and security groups were created under 'test_tenant'.

Closes-Bug: #1335821
Change-Id: Ifde22814ab5c302e751f2102f6fd7ef52c932126
Switch to using of oslo.db

oslo.db first stable release has been cut and we can start using it
instead of openstack/common/db/* code which is now marked obsolete.

Change-Id: I1ccf896922a5a762d37a1a3b93c56c8b8ae8c085
Merge "Switch to using of oslo.db"
Merge "Imported Translations from Transifex"
Merge "Replace occurences of 'test_tenant' with 'test-tenant' in tests"