Check that all po/pot files are valid
Check that all po/pot files are valid

Perform minimal checks on po and pot files so that no broken files can
get imported.

Change-Id: I328fc11c688c16737ae88984e4778483ce5db5ab
Co-Authored-By: Clark Boylan <635fc31d01fa593720982fa0568e87170cedbe2c@gmail.com>
Related-Bug: #1298645

Tan0/ironic,rackerlabs/ironic,naototty/vagrant-lxc-ironic,hpproliant/ironic,JioCloud/ironic,rdo-management/ironic,naterh/ironic,dims/ironic,devananda/ironic,ionutbalutoiu/ironic,froyobin/ironic,naototty/vagrant-lxc-ironic,ramineni/myironic,openstack/ironic,pshchelo/ironic,pshchelo/ironic,bacaldwell/ironic,faizan-barmawer/openstack_ironic,ionutbalutoiu/ironic,SauloAislan/ironic,NaohiroTamura/ironic,NaohiroTamura/ironic,dims/ironic,Tehsmash/ironic,openstack/ironic,redhat-openstack/ironic,SauloAislan/ironic,varunarya10/ironic,debayanray/ironic_backup,supermari0/ironic,bacaldwell/ironic