Description of problem:

Currently if during syncing nothing no new units were added or updated we skip things such as indexing.  This can lead to problems where one sync failed (but imported a bunch of units) so post sync actions are skipped.  On the next sync there are no units and so we skip indexing.  

We should use the counts of the items in the repo to not skip indexing.


Version-Release number of selected component (if applicable):


How reproducible:
Always


Not easy to reproduce, but this should work:

Steps to Reproduce:
1. Create and sync a repo
2. Using pulp-admin watch for the repo publish to start and cancel it
3. Re-sync the repo

Actual results:
After the resync the repo will show in the UI as having no content


Expected results:
After resync content counts are correct