Added new classes to support parameters with known values
switched to using new classes in statementloader
removed print statements
switched more stuff to use knownValues
added headers
fixing logging properties
Fixed correctness issue
fix for failing test
formatting
cleanup
fixed costestimator error
formatting
formatting
allowed for null paramter values
naming consistency
fixed issues
merge hchandl: Support variables with known value(s)

Merge pull request #1378 from hchandl/sql-layer/knownValues
https://github.com/FoundationDB/sql-layer/pull/1378