fix various exception/failure path undefineds (#14) (thanks @24601)

* fix(helpers): fix undefined var in exception handler

* fix(helper): exception handler issue

* fix(slack): SLACK_WEBHOOK_URL was undefined in failure path

---------

Co-authored-by: Farley Farley (yes, really) <farley@neonsurge.com>

helpers.py

@@ -331,7 +331,7 @@ def convert_pvc_to_simpler_dict(pvc):
     try:
         if 'volume.autoscaler.kubernetes.io/scale-up-percent' in pvc.metadata.annotations:
             return_dict['scale_up_percent'] = int(pvc.metadata.annotations['volume.autoscaler.kubernetes.io/scale-up-percent'])
-    except:
+    except Exception as e:
         print("Could not convert scale_up_percent to int: {}".format(e))
 
     try:
@@ -349,7 +349,7 @@ def convert_pvc_to_simpler_dict(pvc):
     try:
         if 'volume.autoscaler.kubernetes.io/scale-up-max-size' in pvc.metadata.annotations:
             return_dict['scale_up_max_size'] = int(pvc.metadata.annotations['volume.autoscaler.kubernetes.io/scale-up-max-size'])
-    except:
+    except Exception as e:
         print("Could not convert scale_up_max_size to int: {}".format(e))
 
     try: