Bug: 45266 Use sequence numbers instead of timestamps

Fix spacing issues.
Turn off DBG flag. Testing complete, ready for review.

IncrementalUpdater.java -- fix bug in recognizing new style server
OAIHarvester.java -- Fix indentation; add parameter to getRecords() to
control addition new URL parameter; add overloaded getRecords(); fix bugs
in getMoreRecords(), hasMore() and getSequence(). Testing continues.

This is a revised version of the earlier fix and should be compatible
with old clients and servers. Needs parallel changes to OAI extension to
remedy the issue of losing updates.

Bug: 45266
Change-Id: Ia8d74f82ecf7d4c5c1b612a39fbcef99bcd10334
Merge "Bug: 45266 Use sequence numbers instead of timestamps"