Checker: Add base of checker list view.

src/Checker/Checker.py

@@ -26,6 +26,10 @@ class AbstractModelChecker(object):
     def description(self):
         return self._description
 
+    @property
+    def summary(self):
+        return self._summary
+
     # Checker status
 
     def is_unknown(self):
@@ -53,11 +57,3 @@ class AbstractModelChecker(object):
             otherelse
         """
         raise NotImplementedMethodeError(self, self.run)
-
-    def summary(self):
-        """Return summary message
-
-        Returns:
-            Return summary string
-        """
-        raise NotImplementedMethodeError(self, self.summary)