[maven-release-plugin] prepare for next development iteration
fix memory issues in FilteredServerView
Merge pull request #583 from metamx/fix-filtered-server-view

fix memory issues in FilteredServerView
fix segment metadataquery
Merge pull request #584 from metamx/fix-segment-metadata-query

fix segment metadataquery
prepare for next release
[maven-release-plugin] prepare release druid-0.6.121
Merge tag 'druid-0.6.121'