Start using Pyflakes and Hacking

Instead of globally ignoring pyflakes and
hacking warnings, only blacklist those that trigger
very frequently so far, in order to clean them
up in followup commits. Fix and start gating
on the rest already.

Change-Id: Ied7c7250061e3bf379e8286e8ce3b9e4af817faf

glanceclient/exc.py

@@ -26,7 +26,7 @@ class BaseException(Exception):
 
 
 class CommandError(BaseException):
-    """Invalid usage of CLI"""
+    """Invalid usage of CLI."""
 
 
 class InvalidEndpoint(BaseException):
@@ -38,11 +38,11 @@ class CommunicationError(BaseException):
 
 
 class ClientException(Exception):
-    """DEPRECATED"""
+    """DEPRECATED!"""
 
 
 class HTTPException(ClientException):
-    """Base exception for all HTTP-derived exceptions"""
+    """Base exception for all HTTP-derived exceptions."""
     code = 'N/A'
 
     def __init__(self, details=None):
@@ -63,7 +63,7 @@ class HTTPMultipleChoices(HTTPException):
 
 
 class BadRequest(HTTPException):
-    """DEPRECATED"""
+    """DEPRECATED!"""
     code = 400
 
 
@@ -72,7 +72,7 @@ class HTTPBadRequest(BadRequest):
 
 
 class Unauthorized(HTTPException):
-    """DEPRECATED"""
+    """DEPRECATED!"""
     code = 401
 
 
@@ -81,7 +81,7 @@ class HTTPUnauthorized(Unauthorized):
 
 
 class Forbidden(HTTPException):
-    """DEPRECATED"""
+    """DEPRECATED!"""
     code = 403
 
 
@@ -90,7 +90,7 @@ class HTTPForbidden(Forbidden):
 
 
 class NotFound(HTTPException):
-    """DEPRECATED"""
+    """DEPRECATED!"""
     code = 404
 
 
@@ -103,7 +103,7 @@ class HTTPMethodNotAllowed(HTTPException):
 
 
 class Conflict(HTTPException):
-    """DEPRECATED"""
+    """DEPRECATED!"""
     code = 409
 
 
@@ -112,7 +112,7 @@ class HTTPConflict(Conflict):
 
 
 class OverLimit(HTTPException):
-    """DEPRECATED"""
+    """DEPRECATED!"""
     code = 413
 
 
@@ -133,7 +133,7 @@ class HTTPBadGateway(HTTPException):
 
 
 class ServiceUnavailable(HTTPException):
-    """DEPRECATED"""
+    """DEPRECATED!"""
     code = 503
 
 
@@ -161,12 +161,12 @@ def from_response(response, body=None):
 
 
 class NoTokenLookupException(Exception):
-    """DEPRECATED"""
+    """DEPRECATED!"""
     pass
 
 
 class EndpointNotFound(Exception):
-    """DEPRECATED"""
+    """DEPRECATED!"""
     pass