Description of problem:
FFU: openstack overcloud ffwd-upgrade run fails if overcloud nodes do not have the rhel-7-server-rhceph-2-osd-rpms repository enabled:

in /usr/share/openstack-tripleo-heat-templates/puppet/services/tripleo-packages.yaml:

  FastForwardCustomRepoScriptContent:
    default: |
      #!/bin/bash
      set -e
      echo "If you use FastForwardRepoType 'custom-script' you have to provide the upgrade repo script content."
      echo "It will be installed as /root/ffu_upgrade_repo.sh on the node"
      echo "and passed the upstream name (ocata, pike, queens) of the release as first argument"
      case $1 in
        ocata)
          subscription-manager repos --disable=rhel-7-server-openstack-10-rpms
          subscription-manager repos --enable=rhel-7-server-openstack-11-rpms
          ;;
        pike)
          subscription-manager repos --disable=rhel-7-server-openstack-11-rpms
          subscription-manager repos --enable=rhel-7-server-openstack-12-rpms
          ;;
        queens)
          subscription-manager repos --disable=rhel-7-server-openstack-12-rpms
          subscription-manager repos --enable=rhel-7-server-openstack-13-rpms
          subscription-manager repos --disable=rhel-7-server-rhceph-2-osd-rpms
          subscription-manager repos --disable=rhel-7-server-rhceph-2-mon-rpms
          subscription-manager repos --enable=rhel-7-server-rhceph-3-mon-rpms
          subscription-manager repos --disable=rhel-7-server-rhceph-2-tools-rpms
          subscription-manager repos --enable=rhel-7-server-rhceph-3-tools-rpms
          ;;
        *)
          echo "unknown release $1" >&2
          exit 1
      esac
    type: string


Version-Release number of selected component (if applicable):
openstack-tripleo-heat-templates-8.0.4-20.el7ost.noarch

How reproducible:
100%

Steps to Reproduce:
1. Deploy OSP10 without Ceph OSD nodes
2. Upgrade to OSP13 via ffu procedure by using the default script provided by FastForwardCustomRepoScriptContent

Actual results:
          subscription-manager repos --disable=rhel-7-server-rhceph-2-osd-rpms fails as the repo is not enabled

Expected results:
          subscription-manager repos --disable=rhel-7-server-rhceph-2-osd-rpms runs only when the repo is enabled as it is a requirement only for nodes running ceph osds

Additional info: