pkg: monitoring: postinst: really stop the agent
pkg: monitoring: postinst: really stop the agent

Really stop the agent. First try to be polite with init but in case that
fails read in the PIDFILE and slay it ourselves

virgo-agent-toolkit/rackspace-monitoring-agent,AlphaStaxLLC/rackspace-monitoring-agent,kaustavha/rackspace-monitoring-agent,christopherjwang/rackspace-monitoring-agent,cp16net/virgo-base,virgo-agent-toolkit/rackspace-monitoring-agent,AlphaStaxLLC/rackspace-monitoring-agent,cp16net/virgo-base,christopherjwang/rackspace-monitoring-agent,cp16net/virgo-base,cp16net/virgo-base,kaustavha/rackspace-monitoring-agent,cp16net/virgo-base