Update for ARM:
 * Update cache locations.
 * Update repo from mdns to IP.
 * Update timeouts and sync counts.
Downgrade ros_comm to remove lisp dependency.
Update ros_comm to ARM GBP.
ros_comm: 1.9.51-0 in 'hydro/release.yaml' [bloom]
Release ros_comm 1.9.53
Prune packages.