Remove concept, helpers and tests of accurate per-GI row counts
Bump data version
Minor cleanup
merge nathanlws: Remove group index row counters

Merge pull request #1237 from nathanlws/sql-layer/no-gi-row-counts
https://github.com/FoundationDB/sql-layer/pull/1237
Standardize and improve logging from join enumerator.
merge MMcM: Standardize and improve logging from join enumerator.

Merge pull request #1238 from MMcM/sql-layer/dphyp-logging
https://github.com/FoundationDB/sql-layer/pull/1238