added more bql testcases
code clean
added more bql test for template
Merge remote branch 'wonlay/master'
set group field even only one group by field is set.
Merged from master
disable pre variables replacing for bql for now.
First working version of fastjson.
Merged from fastjson
Fix NPE.
Fix kafka NPE.
fast json is now passing basic tests.
Merge branch 'fastj' into sig
add query log for federated broker.
return only selected fields from node to reduce serialization and network costs.
Merge branch 'master' into sig
add metrics for dismissing events by jhartman.
always carry required fields over.
restore runtime facet when merging.
upgrade fastjson version to fix permgen mem leak.