Adding start, stop and cleaning of seriesly and collection of logs after test runs

Change-Id: I3b732128c237e42e5437471fcea9d7229bbccae8
Reviewed-on: http://review.couchbase.org/36712
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Pavel Paulau <pavel.paulau@gmail.com>