Delay between minting a DOI and query the DOI

[taojing2002]

Fianna reported that a document of a DOI could not be update after minting. The issue root from the delay between the minting a DOI and the DOI is searchable. OSTI folks said the delay is un-avoidable and delay is down to about 1 second from 5 seconds.

Since the gestStatus method needs to query OSTI, we are going to add a waiting time (by a loop with limited and configurable iterations) in this method to wait until the DOI is searchable.

Note: The delay happens not only in the minting process but also the update of the DOI document. Our code heavily depends on the query result to issue different commands. So the race condition will get worse.

[taojing2002]

This only happens on v2. But we need to confirm that v1 doesn't have the issue.