fix(hostinfo/apache2): make sure the user field exists before tryin to get its size
fix(hostinfo/apache2): make sure the user field exists before tryin to get its size

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