Description of problem:
When running satellite-sync on a slave ISS server it will not syncronize channels that have been previously syncronized without specifying channels
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Setup master/slave ISS configuration and export org with channels to slave
2. Run initial satellite-sync -c to syncronize channel
3. Run satellite-sync without flags and you will receive an error
ERROR: No channels currently imported; try satellite-sync --list-channels; then satellite-sync -c chn0 -c chn1...
It would mark any previously syncronized servers as previously imported when initial import is done so that all previously imported channels will sync with a satellite-sync execution.