Revert "Pause diskimage builds for centos-7"
Revert "Pause diskimage builds for centos-7"

We have a new release of diskimage-builder to fix this. Turned out to
be an issue with dracut.

This reverts commit 8fa2c4ddb6209d0cf6f80d3dfd3dde1e8baddc17.

Change-Id: Ib98c9b04d19a29c95be47d45b3ed1a99ca7754a1
Depends-On: Iaf2a1e8470f642bfaaaad3f9b7f26cfc8cc445c9
Signed-off-by: Paul Belanger <e7139c8e6c4ea75cc1c287ce081b2dc0f3ab39ec@redhat.com>

openstack-infra/project-config,openstack-infra/project-config,Tesora/tesora-project-config,Tesora/tesora-project-config