Revert "process monitoring for labsdb"

This broke catalog compilation on labsdb1003. Reverting only on the
grounds of getting puppet running again. Plus monitoring resources
should be defined in the role level and not in the module level, since
that makes the modules having inter dependencies and not being testable
or debuggable easily. The actual error was:

Error 400 on SERVER: Duplicate declaration:
Nrpe::Monitor_service[mysqld] is already declared in file
/etc/puppet/manifests/role/db.pp:97; cannot redeclare at
/etc/puppet/modules/mariadb/manifests/monitor_process.pp:13 on node
labsdb1003.eqiad.wmnet

This reverts commit 2ada2399f84dcaf5480ef0ab323053b43642de8d.

Change-Id: I1336221a0624226812500c59b7eeb570b81ccf47