Arithmetic operation with String coercion in constraint fails in executable-model

Issue

When rule condition looks like the following, build with executable model fails.

rule R1
dialect "mvel"
when
  StrBdHolder($str: str, bd == $str * -1)
then
end

The error is :

The operator * is undefined for the argument type(s) String, int

In this example, bd is BigDecimal type property and str is String type property.

i.e. Arithmetic operation with the following parameters in condition fails.

• bind variable of String type
• negative literal number