Remove suspicious uses of toLower and toUpper
merge nathanlws: Remove suspicious uses of toLower and toUpper

Merge pull request #1184 from nathanlws/sql-layer/cleanup-identifier-casing
https://github.com/FoundationDB/sql-layer/pull/1184
merge MMcM: Display binding positions in OperatorCompilerTest output

Merge pull request #1185 from MMcM/sql-layer/operator-compiler-test-binding-positions
https://github.com/FoundationDB/sql-layer/pull/1185
Add a test that demonstrates the problem.
Assign binding positions once only; do not reuse (except for BloomFilter filter and inner row).
One plan changed slightly.