[WIP] register services managed by Pacemaker

We keep track of which services are managed by Pacemaker, so that init scripts can refuse to start/stop those services unless run by Pacemaker. This protects against cloud operators erroneously attempting to
start/stop the services due to muscle memory or simple ignorance of the [documented contract](https://www.suse.com/documentation/sle_ha/book_sleha/data/sec_ha_configuration_basics_resources.html).

**WARNING**: do not merge - not yet tested!  Need to debug DRBD issue first.