Fix method name conventions
Rename ClLinearExpression.set_constant() method to setConstant()
Rename ClLinearExpression.contant() method to getConstant()
Change change_value to changeValue
This test fails because:
setEditedValue calls beginEdit and endEdit internally
the variable y needs to be added as a stay
Merge branch 'linear_constraint_abstract'
Merge branch 'test_case_fix'