Fix static method parameter validation

Contract validation expected "this" parameter to be of
either MuranoType or Murano object type. However
for static method parameters it is MuranoTypeReference
and this case wasn't handled

Change-Id: I97b08b9383d47b6a66cff6db722e5467d0278f44
Closes-Bug: #1553186

murano/dsl/typespec.py

@@ -36,6 +36,8 @@ class Spec(object):
         if default is None:
             default = self.default
         executor = helpers.get_executor(context)
+        if isinstance(this, dsl_types.MuranoTypeReference):
+            this = this.type
         if isinstance(this, dsl_types.MuranoType):
             return self._contract.transform(
                 value, executor.create_object_context(this),

murano/tests/unit/dsl/meta/TestStatics.yaml

@@ -39,8 +39,8 @@ Properties:
     Usage: Static
 
   instanceProperty:
-    Contract: $.string()
-    Default: instanceProperty
+    Contract: $.int()
+    Default: 555
 
   staticProperty2:
     Contract: $.string()
@@ -67,7 +67,7 @@ Methods:
 
   testCallStaticMethodOnClassNameWithNs:
     Body:
-      Return: ns:TestStatics.simpleStaticMethod()
+      Return: ns:TestStatics.simpleStaticMethod($.instanceProperty)
 
   testCallStaticMethodFromAnotherMethod:
     Body:
@@ -91,8 +91,12 @@ Methods:
 
   simpleStaticMethod:
     Usage: Static
+    Arguments:
+      arg:
+        Contract: $.int()
+        Default: 0
     Body:
-      Return: 123
+      Return: 123 + $arg
 
   simpleStaticMethod2:
     Usage: Static

murano/tests/unit/dsl/test_statics.py

@@ -57,7 +57,7 @@ class TestStatics(test_case.DslTestCase):
 
     def test_call_static_method_on_class_name_with_ns(self):
         self.assertEqual(
-            123, self._runner.testCallStaticMethodOnClassNameWithNs())
+            678, self._runner.testCallStaticMethodOnClassNameWithNs())
 
     def test_call_static_method_from_another_method(self):
         self.assertEqual(