Import a required module

'softwareupdater.py' raises an exception when it tries to update its local time via NTP during an update.  The message logged is '[do_rsync] Unable to update ntp time. Not updating', however, updating the time via NTP was found to be functioning correctly.  After some tracing and troubleshooting, the root cause of the NTP exception was found to be an import issue: 'global name 'time_updatetime' is not defined'.  It appears 'softwareupdater.py' has not been importing a required 'time.r2py' module.  It is unclear how this module has been working correctly until now. (perhaps repy2 changed the way imports are handled?)  In addition to issues with exception handling, the softwareupdater.py unit tests produce diffrent results after every invocation (temp files are not properly removed, processes killed, etc?)