Fix image upload job
Fix image upload job

Image upload jobs updated in [1] to execute both
convert-upload-undercloud.sh and upload-cloud-images.sh scripts,
both scripts creates $FULL_HASH directory, so script running
second fails as directory is already created. This patch fixes it.

[1] https://review.rdoproject.org/r/#/c/10128

Change-Id: I62e917b3200dc0341af279b5f9ed9d44a7983f59

redhat-openstack/rdo-infra,rdo-infra/ci-config,rdo-infra/ci-config,redhat-openstack/rdo-infra,rdo-infra/ci-config,rdo-infra/ci-config,redhat-openstack/rdo-infra,redhat-openstack/rdo-infra