Add decorator expected_errors for ips v3 extension

Add decorator expected_errors for ips v3 extesion, that's required
for all the v3 extension.

Change-Id: Iad071fd77bd3571087badc1d836275bd64d8dfc8
libvirt: convert CacheConcurrencyTestCase to avoid DB usage

The CacheConcurrencyTestCase test case does not do anything DB
related. Convert it to NoDBTestCase to avoid DB setup penalty.
This improves perf from 1.7s to 0.2s

Partial-bug: #1369516
Change-Id: I8ef124e9f5d86a990722019978c725c955ffb1ea
Imported Translations from Transifex

Change-Id: I001f99ec0757061db9bca2af13fb124f995498ba
Merge "Add decorator expected_errors for ips v3 extension"
Merge "Imported Translations from Transifex"
Merge "libvirt: convert CacheConcurrencyTestCase to avoid DB usage"