caucase.cli: Silence pylint warning.

caucase/cli.py

@@ -162,13 +162,13 @@ class CLICaucaseClient(object):
       crt_id = int(crt_id)
       try:
         crt_pem = self._client.getCertificate(crt_id)
-      except CaucaseError as e:
-        if e.args[0] != http_client.NOT_FOUND:
+      except CaucaseError as exception:
+        if exception.args[0] != http_client.NOT_FOUND:
           raise
         try:
           self._client.getCertificateSigningRequest(crt_id)
-        except CaucaseError as e:
-          if e.args[0] != http_client.NOT_FOUND:
+        except CaucaseError as csr_exception:
+          if csr_exception.args[0] != http_client.NOT_FOUND:
             raise
           self._print(crt_id, 'not found - maybe CSR was rejected ?')
           error = True