Unreverting an earlier revert.

Revert "Merge pull request #1819 from VoltDB/ENG-7231-revert-ee-limit-execute-delete"

This reverts commit 528f3edb2cfe07e2c64eeba42ab5fd5c91e3bc91, reversing
changes made to f8ef36f3f5ac0c6599e1d10375fcd2274fcfbbbf.

Conflicts:
	tests/testprocs/org/voltdb_testprocs/regressionsuites/sqlfeatureprocs/sqlfeatures-new-ddl.sql
Un-refactor insert executor
Remove unused variable m_partitionColumnIsString and associated dead
code from insert and update executor
Back out bad indenting, make new method in insert executor private
instead of protected.
Merge pull request #1855 from VoltDB/cwolff-reintroduce-capped-collections-backend

Reintroduce capped collections backend