style(pep8): remove unreferenced variables

This patch set removes unreferenced exception variables indentified by PEP8.
Follow up patch sets will perform:

- Better exception handling and messaging;
- CICD pipeline should correctly fail these PEP8 violation.

Change-Id: I681a2d3c7836eb10a5906d4b035e99aff574b18d
Signed-off-by: Tin Lam <tin@irrational.io>

armada/api/__init__.py

@@ -54,7 +54,7 @@ class BaseResource(object):
 
         try:
             return list(yaml.safe_load_all(raw_body.decode('utf-8')))
-        except yaml.YAMLError as jex:
+        except yaml.YAMLError:
             with excutils.save_and_reraise_exception():
                 self.error(
                     req.context,

armada/api/controller/test.py

@@ -134,7 +134,7 @@ class TestReleasesManifestController(api.BaseResource):
                 tiller_namespace=req.get_param(
                     'tiller_namespace', default=CONF.tiller_namespace))
         # TODO(fmontei): Provide more sensible exception(s) here.
-        except Exception as e:
+        except Exception:
             err_message = 'Failed to initialize Tiller handler.'
             self.error(req.context, err_message)
             return self.return_error(