Propose translations: Fix handling of deleted files
Propose translations: Fix handling of deleted files

Today's propose_translation_update.sh run failed for ceilometer since
files were deleted but the loop in filter_commit considered these
as zero changing lines. Change the loop to check only new and modified
files.

Change-Id: I94f5389b9fe0c16d529860f57bb63ef8a3c5c64a

Tesora/tesora-project-config,noorul/os-project-config,Tesora/tesora-project-config,openstack-infra/project-config,anbangr/osci-project-config,citrix-openstack/project-config,coolsvap/project-config,dongwenjuan/project-config,dongwenjuan/project-config,coolsvap/project-config,citrix-openstack/project-config,noorul/os-project-config,anbangr/osci-project-config,openstack-infra/project-config