drill

49042bca - DRILL-2668: Fix: CAST(1.1 AS FLOAT) was yielding DOUBLE.

DRILL-2668: Fix: CAST(1.1 AS FLOAT) was yielding DOUBLE. - Added test method (and others for parallel cases) to TestFunctionsQuery. - Fixed use of DOUBLE methods/classes for FLOAT: - Changed a FLOAT -> DOUBLE mapping in ValueExpressions. - Added parallel FLOAT methods/classes in EvaluationVisitor.