Merge branch 'm2crypto_exceptions' of https://github.com/nickbroon/osc

The babysitter module sets SSLError and SSLVerificationError to None, if
m2crypto is, for instance, missing. This works in python2 but breaks in
python3. Hence, both should be classes that inherit from Exception.

osc/babysitter.py

@@ -22,8 +22,10 @@ try:
     from M2Crypto.SSL.Checker import SSLVerificationError
     from M2Crypto.SSL import SSLError as SSLError
 except:
-    SSLError = None
-    SSLVerificationError = None
+    class SSLError(Exception):
+        pass
+    class SSLVerificationError(Exception):
+        pass
 
 try:
     # import as RPMError because the class "error" is too generic