VPNaaS and FWaaS support in Horizon have been merged as FFE for Havana.
This commit updates the source lang PO files to sync Transifex resources.
PO files of other languages are not updated since they should be updated
by Transifex transifex.
Change-Id: Ic2e93d6ec6e296e5e3c7e6c0e4731ce588f0d89d
abca5513a2