DERBY-6775 add to testBlobLinkedListReclamationOnRollback() test to check that free space is used on subsequent inserts

increasing wait time, hoping to make test stable on slow machine in
oracle nightly testing.  Making it retry at least twice and increasing
second retry time.



git-svn-id: https://svn.apache.org/repos/asf/db/derby/code/trunk@1647844 13f79535-47bb-0310-9956-ffa450edef68