Add fail-safe so any kind of exception is handled in XML-RPC server.

If an exception is not handled here then the context isn't destroyed
leaving at least an LDAP connection dangling. This means the next time
this thread/process tries to handle a connection it will fail because
a context already exists.

ipalib/backend.py

@@ -123,6 +123,11 @@ class Executioner(Backend):
                 'non-public: %s: %s', e.__class__.__name__, str(e)
             )
             error = InternalError()
+        except Exception, e:
+            self.exception(
+                'unhandled exception: %s: %s', e.__class__.__name__, str(e)
+            )
+            error = InternalError()
         destroy_context()
         if error is None:
             return result