Make stream filter stats show hex ScopeID
Make stream filter stats show hex ScopeID

The 0x prefixed hex ScopeID is used in most places, changed to be
consistent.

Change-Id: Ibec1595981e42a008c4340fdf34659094fe0b33e
Reviewed-on: http://review.couchbase.org/c/kv_engine/+/126280
Tested-by: Build Bot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Richard de Mellow <3b8534f7ae49c77465cd6f1b512f27ec39f3eddd@couchbase.com>

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