Fix the nodepool file check
Fix the nodepool file check

The check was meant to verify two things:
 - the nodepool file exists
 - the nodepool file is not zero size

Combining them doesn't work, though, so this was never executing
as intended. This patch fixes that.

Conflicts:
------scripts/gate-check-commit.sh

Change-Id: I7a192614afb00d11de1fd944ff20c0c89223f5c3
(cherry picked from commit affb541c3f0966f686c18dd10ddb640e4686449d)

VaneCloud/openstack-ansible,VaneCloud/openstack-ansible,yanyao/openstack-deployment,yanyao/openstack-deployment,VaneCloud/openstack-ansible,yanyao/openstack-deployment,yanyao/openstack-deployment