Merge pull request #1050 from tushargosavi/hds

Change in query protocol.
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
Ensure writer errors are propagated.
Add test for async exception propagation.
Convert to absolute path.
Fix serialization issues.
Reader retry on data file rewrite.
Fix invalid query result when key not present.
Merge pull request #1059 from tweise/hds

Fix invalid query result when key not present.
Fixing key de-serialization order of publisherId,advertizerId,adUnit
Merge branch 'hds' of github.com:Datatorrent/Malhar into hds