Remove dead and unneeded code. Fix one invalid test.
Move buildIndexes into AbstractStore
Move a couple helpers to StoreAdapter
Move OperatorStore into AbstractStore
Fix tests extending OperatorStore. Removed unused paramter from buildIndexes.
Remove unneeded StoreAdapter create method
Remove now incorrect comments about OperatorStore
merge nwilliams: Move all OperatorStore based group index logic into AbstractStore.

https://code.launchpad.net/~nwilliams/akiban-server/operator-store-into-abstract-store/+merge/170960
Fix bug #1191111 - A subtle disconnect of the uses of MString/TString by varchar and text/clob columns. The latter were using the type parameters in a different order and confusing the Charset lookup
merge tjoneslo: Fix bug #1191111 - there was a subtle disconnect in the use of the type parameters for the MString/TString between the (VAR)CHAR and CLOB/TEXT types.

https://code.launchpad.net/~tjoneslo/akiban-server/fix-bug-1191111/+merge/171427