Dict based properties are not supported

[Vahid Hashemian]

If a property is specified as a dict heat-translator automatically assumes it involves a function call (such as get_input, get_property, ...). However, a property can be dict based and not making any function call. An example from SoftwareComponent node type:

     ...
        admin_credential:
          user: admin
          token: abcd
     ...

Support for such property definitions should be added.