[Create] Filter out control-less properties

When properties have no control defined, don't show them
in the create dialog (but do show them in metadata, e.g.
info bubble.) For nasa/openmctweb#92

platform/commonUI/browse/test/creation/CreateWizardSpec.js

@@ -42,7 +42,9 @@ define(
                     "property" + name,
                     [ "getDefinition", "getValue", "setValue" ]
                 );
-                mockProperty.getDefinition.andReturn({});
+                mockProperty.getDefinition.andReturn({
+                    control: "textfield"
+                });
                 mockProperty.getValue.andReturn(name);
                 return mockProperty;
             }
@@ -157,4 +159,4 @@ define(
 
         });
     }
-);
+);