Fix dict ordering failures in comparison

With python3 and py.test we run with random hash seeds. This causes some
failures in the test suite because we go deeper into some XML trees that
we expected and run into even deeper inequalities. AFAICT, this simply
makes comparisons return False when they would normally do so.

Author: SpamapS

src/saml2/__init__.py

@@ -827,10 +827,14 @@ def __eq__(self, other):
                     return False
             elif isinstance(svals, list):
                 for sval in svals:
-                    for oval in ovals:
-                        if sval == oval:
-                            break
-                    else:
+                    try:
+                        for oval in ovals:
+                            if sval == oval:
+                                break
+                        else:
+                            return False
+                    except TypeError:
+                        # ovals isn't iterable
                         return False
             else:
                 if svals == ovals:  # Since I only support '=='