Tosca Constraint "in_range" not supported by policy/models

There are several tosca constraints supported by policy/models, such as "greater_or_equal" or "greater_than". However, support is required for the "in_range" constraint. This constraint is used by our Kubernetes PMSH Tosca Service Template that is used our current demos.

Lack of support for the constraint results in errors when editing the common properties of the service template.