bump to 2.0.0 [skip ci]
bump to 2.0.0 [skip ci]

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