Knowledge- Restarting otto server when website sync is in progress results in all the synced files to get resynced.

[sangee2004]

Steps to reproduce the problem:

1. Create an agent with knowledge from website like intel.com
2. When initial sync is still in progress , redeploy otto server with latest version.
3. After otto server is redeployed with new version , check the progress on file sync.
4. Notice that the Files Synced count does not change and files already synced are being scraped again.

Expected Behavior:
There is should be no need to scrape the files that have already been synced. File sync should proceed with syncing the files that have not been synced .

[cjellick]

To me, this seems to be a dupe of #536

[sangee2004]

Closing this issue as dupe of #536