Close scanner when reached max_results.

When the suggest scanner has reached max_results, close the scanner.

This requires upstream fix for asynchbase for 0.96+:
https://github.com/OpenTSDB/asynchbase/pull/91
Merge branch 'master' of github.com:manolama/opentsdb
fix RTPublisher public  data with reverse logic error
Avoid HBase lookups in TsdbQuery.toString().

Calling UniqueId.getName() in the TsdbQuery.toString() method is causing
deadlocks when logging the results of a TsdbQuery execution (if the uids
aren't cached locally). This changes the behavior of
TsdbQuery.toString() to avoid any external calls which could trigger a
HBase lookup.