Set kafka serializer by default.
Merge pull request #1053 from tweise/hds

Set kafka serializer by default.
Time bucket the query range parameters.
Merge pull request #1054 from tweise/hds

Time bucket the query range parameters.
Limit aggregation to 5 mins by default.
Add missing getter.
Tighten test.
Merge pull request #1055 from tweise/hds

Add missing getter.
Adjust logging.
Merge branch 'hds' of https://github.com/DataTorrent/Malhar into hds
Fixing ordering key serialization order