Refactor: fix verbosity executor
Refactor: fix verbosity executor

Use getExtra() to fetch the extra field to be prepared
for receiving frame extras.

Change-Id: I9a7ab2a750c991d0d3a06d73529db4e26f83b2b8
Reviewed-on: http://review.couchbase.org/101298
Reviewed-by: Jim Walker <1cd02e31b43620d7c664e038ca42a060d61727b9@couchbase.com>
Tested-by: Build Bot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>

daverigby/kv_engine,daverigby/kv_engine,daverigby/kv_engine,daverigby/kv_engine