Coverity analysis defect 72071: Don't call

The called function is unsafe for security related code

Defect 72071 (STATIC_C)
Checker DC.WEAK_CRYPTO (subcategory none)
File: /src/mongo/scripting/bson_template_evaluator.cpp
Function mongo::BsonTemplateEvaluator::evalRandInt(mongo::BsonTemplateEvaluator*, const char *, const mongo::BSONObj &, mongo::BSONObjBuilder &)
/src/mongo/scripting/bson_template_evaluator.cpp, line: 172
"rand()" should not be used for security related applications, as linear congruential algorithms are too easy to break.

            int randomNum = min + (rand() % (max - min));