Remove poll() and getInitialPollingInterval() as don't apply to CMPI; added MI_enable/disableIndications() and modified return / exception handling of all indications methods:  if no exception thrown, assume success
Remove poll() and getInitialPollingInterval() as don't apply to CMPI; added MI_enable/disableIndications() and modified return / exception handling of all indications methods:  if no exception thrown, assume success

williamdean/pywbem,zenoss/pywbem,zenoss/pywbem,williamdean/pywbem