agent: monitoring: default: move init to agent:start()
agent: monitoring: default: move init to agent:start()

Right, this has to be an if else statement. Move all of the logic into a
:start() method instead.

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