Enable pylint lost exception check

Commit enables check and also fixes:
ipaserver/dcerpc.py:718: [W0150(lost-exception),
DomainValidator.__search_in_dc] return statement in finally block may
swallow exception)

Reviewed-By: Jan Cholasta <jcholast@redhat.com>

ipaserver/dcerpc.py

@@ -714,8 +714,8 @@ class DomainValidator(object):
                         root_logger.debug(msg)
                     else:
                         root_logger.warning(msg)
-                finally:
-                    return entries
+
+                return entries
 
     def __retrieve_trusted_domain_gc_list(self, domain):
         """

make-lint

@@ -264,7 +264,6 @@ def main():
         linter.set_option('disable', 'global-statement')
         linter.set_option('disable', 'global-variable-not-assigned')
         linter.set_option('disable', 'global-variable-undefined')
-        linter.set_option('disable', 'lost-exception')
         linter.set_option('disable', 'no-init')
         linter.set_option('disable', 'pointless-except')
         linter.set_option('disable', 'pointless-statement')