Make LocalConsensus assign OpId's after the OpId of the last LogEntry
Make LocalConsensus assign OpId's after the OpId of the last LogEntry

Currently LocalConsensus is always assigning OpId's starting from 1.
To continue a Log we need to start assigning OpId's after the last LogEntry in
the Log or we'll have multiple entries with the same OpId.

Change-Id: Idd1d430923fd79a80caabdd0ca0e33cacdf739f0
Reviewed-on: http://gerrit.ent.cloudera.com:8080/791
Tested-by: jenkins
Reviewed-by: Matteo Bertozzi <1d5ca967930bde0bdce795acbf71a5e281d2d4e5@cloudera.com>

EvilMcJerkface/kudu,helifu/kudu,andrwng/kudu,InspurUSA/kudu,EvilMcJerkface/kudu,InspurUSA/kudu,InspurUSA/kudu,helifu/kudu,EvilMcJerkface/kudu,EvilMcJerkface/kudu,helifu/kudu,andrwng/kudu,cloudera/kudu,cloudera/kudu,cloudera/kudu,InspurUSA/kudu,helifu/kudu,andrwng/kudu,cloudera/kudu,InspurUSA/kudu,andrwng/kudu,helifu/kudu,helifu/kudu,andrwng/kudu,andrwng/kudu,EvilMcJerkface/kudu,InspurUSA/kudu,helifu/kudu,EvilMcJerkface/kudu,helifu/kudu,cloudera/kudu,InspurUSA/kudu,cloudera/kudu,andrwng/kudu,cloudera/kudu,andrwng/kudu,EvilMcJerkface/kudu,EvilMcJerkface/kudu,InspurUSA/kudu,InspurUSA/kudu,andrwng/kudu,EvilMcJerkface/kudu,cloudera/kudu,cloudera/kudu,helifu/kudu