use num processing threads for realtime query execution
Merge pull request #239 from metamx/mt-rt

Correctly use number of processing threads for realtime query execution
Use shared query executor in indexing-service
fix example properties for real time node
Merge branch 'master' of github.com:metamx/druid
[maven-release-plugin] prepare release druid-0.5.55
[maven-release-plugin] prepare for next development iteration
fix how druid services is assembled
Merge branch 'master' of github.com:metamx/druid
[maven-release-plugin] prepare release druid-0.5.56
[maven-release-plugin] prepare for next development iteration
[maven-release-plugin] prepare release druid-0.5.57
[maven-release-plugin] prepare for next development iteration
[maven-release-plugin] prepare release druid-0.5.58
[maven-release-plugin] prepare for next development iteration