Calculator ROUND (A) function uses a different rounding method than ROUND (A, B)

This has not been reported yet, but was found by implementing the Calculator function STDROUND by PDI-1311 (New Calculator Calculation Type to support standard rounding) and creating validation samples:

ROUND (A)

• it uses round(ValueMetaInterface metaA, Object dataA) that performs a Math.round(): Returns the closest Integer to the argument

ROUND (A,B)

• uses not the Math.round but methods with the rounding method ROUND_HALF_EVEN

This leads to different rounding methods with or without precision, please see the attached example.
The newly implemented STDROUND (A) or STRDOUND (A,B) uses consistent ROUND_HALF_UP

Notes:
a) Since the implementation of PDI-1311, the different behavior is documented over here: http://wiki.pentaho.com/display/EAI/Calculator
b) By fixing the existing code, this would have backward compatibility impact
c) New rounding functions should be used when implementing a consistent rounding for:
1) Returns the closest Integer to the argument
2) Method "Round half to even"