monitoring: client: self -> this
monitoring: client: self -> this

this code seems to be written before luvit had an interval timer. This
should be fixed in the near future but for now make sure we use `this`
consistently.

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