add broken test for having
correctly track input columns for having clauses in group by queries
fixup! correctly track input columns for having clauses in group by queries
remove travis badge (builds are flaky)
try to fix flaky blob RecoveryTest
Merge pull request #1459 from crate/j/group-by-having

correctly plan group by queries using HAVING clause
catch CollectionAbortedException in LuceneDocCollector
improve error messages on copy to and copy from