Online backup do not finish due to pulp cache symlink on Red Hat Satellite 6.

Issue

• Online backup never finishes due to /var/lib/pulp/cache symlink on Red Hat Satellite 6 and the below error is observed.

  Failed executing tar --selinux --create --file=/backup/satellite-backup-yyyy-01-24-x-x-x/pulp_data.tar --exclude=var/lib/pulp/katello-export     --listed-incremental=/backup/satellite-backup-yyyy-01-24-x-x-x/.pulp.snar --transform 's,^,var/lib/pulp/,S' -S *, exit status 2:
  tar: cache/reserved_resource_worker-4@li-lc-2224/yy-f49e-466e-a2a9-xxxxxxxxxxx: Cannot stat: No such file or directory
  tar: cache/reserved_resource_worker-4@li-lc-2224/yy-f49e-466e-a2a9-xxxxxxxxxxx/Packages: Cannot stat: No such file or directory
  tar: cache/reserved_resource_worker-4@li-lc-2224/yyy-f49e-466e-a2a9-xxxxxxxxxxx/Packages/3: Cannot stat: No such file or directory
  

• The online backup never finishes because while creating the pulp tarball it is trying to include files from the pulp cache directory that is moved to do not exists on Red Hat Satellite.