Add log messages and debug checks to COW context.
Fix mac compilation errors.
Don't check COW remaining count if the table is empty.
Merge branch 'master' of https://github.com/alexeevm/voltdb
ENG-5863: ALTER and DROP table for jenkins.
Merge branch 'master' into ENG-5863
Merge branch 'master' into ENG-5863
ENG-5863: Add tests for alter and drop.
ENG-5863: ALTER and DROP table for jenkins.
ENG-5863: Add tests for alter and drop.
ENG-5863: Add more tests and checking.
Merge branch 'ENG-5863' of github.com:VoltDB/voltdb into ENG-5863
ENG-5863: add missing tests/frontend/org/voltdb/compiler/MyTableProcedure.java
ENG-5863: remove dup tests
Merge branch 'master' into ENG-5863
ENG-5863: some simple changes....bigger changes remain.
ENG-5863: Add more cases
Merge branch 'master' into ENG-5863
resolved merge conflict
ENG-5863: add some tests.