Fix coverity scan warning in fdb_functional_test
Fix coverity scan warning in fdb_functional_test

*** CID 148205:  Memory - illegal accesses  (UNINIT)
/forestdb/tests/functional/fdb_functional_test.cc: 1797 in
_worker_thread(void *)()
1791         if (c % args->nbatch == 0) {
1792               // commit for every NBATCH
1793               fdb_commit(dbfile, FDB_COMMIT_NORMAL);
1794               commit_count++;
1795               fdb_file_info info;
1796               fdb_get_file_info(dbfile, &info);
>>>     CID 148205:  Memory - illegal accesses  (UNINIT)
>>>     Using uninitialized value "info.new_filename".

Change-Id: I7d89ca32f23edc9cceffb2f6afb1247d57f3f762
Reviewed-on: http://review.couchbase.org/67762
Reviewed-by: Chiyoung Seo <fcffc23db27b19ee4ebba46695ee6b50e09216a2@couchbase.com>
Tested-by: buildbot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>

wurikiji/forestdb,couchbase/forestdb,wurikiji/forestdb,couchbase/forestdb,hisundar/forestdb,hisundar/forestdb