Create a fake netconf client for Cisco nexus unit tests

Fixes bug 1159560

Change-Id: Idb0578a16d3944052a0302415c6c0d96e87cc485
Imported Translations from Transifex

Change-Id: I07f9138424a97ee6ca8a6f758e567ace2df0e65e
Mark 'sql_connection' config option as secret

Fixes bug 1160680.

Change-Id: I42b16d006f162cb41090fa34677d6ad054b6a55a
Merge "Create a fake netconf client for Cisco nexus unit tests"
Merge "Mark 'sql_connection' config option as secret"
Merge "Imported Translations from Transifex"