Fix bug with 'and' predicate and constraint in MipWrapper.
Fix bug with 'and' predicate and constraint in MipWrapper.

JElchison/Numberjack,eomahony/Numberjack,eomahony/Numberjack,eomahony/Numberjack,eomahony/Numberjack,JElchison/Numberjack,JElchison/Numberjack,JElchison/Numberjack,JElchison/Numberjack,eomahony/Numberjack