Cache target table template tuple and its schema in insert executor, to avoid serializing default values on every insert.
ENG-6672 Fixed 'Missing DDL' error
Incorporate feedback from Xin and Paul's review comments:
- Make StandAloneTupleStorage allocate and free its own TupleSchema
- Remove StandAloneTupleStorage's cast operator overloads, update clients
- Remove redudant code that Paul spotted in NestLoopIndexExecutor
Merge branch 'master' into ENG-6704-tpcc-perf-regression

Conflicts:
	src/ee/executors/nestloopexecutor.cpp
	src/ee/executors/nestloopindexexecutor.cpp
Merge branch 'master' into ENG-6672-SchemaReport-MissingDDL-New
Merge pull request #1554 from VoltDB/ENG-6704-tpcc-perf-regression

Cache target table template tuple and its schema in insert executor, to ...
matview benchmark: move diff charts to series 1, 2
Fix some test bugs in TestClientPortChannel, they weren't failing but a test wasn't testing and another was redundant
ENG-6672 Resolved Jenkins test failures
Merge pull request #1553 from VoltDB/ENG-6672-SchemaReport-MissingDDL-New

ENG-6672 Fixed 'Missing DDL' error on the catalog report page.
Merge pull request #1567 from VoltDB/fix-port-tests

Fix some test bugs in TestClientPortChannel, they weren't failing but a ...
Merge branch 'master' into httpexport