Remove netaddr package requirement

An auth_host with : in the name is going to require wrapping in []
because otherwise the : is confused with the port separator, so the
code doesn't have to verify that it's an IPv6 address. This allows
the removal of the netaddr package requirement.

Change-Id: I0d4c622b360769f1a7587d3c230e50d22f5b75a4

keystonemiddleware/auth_token.py

@@ -175,7 +175,6 @@ from keystoneclient.auth import token_endpoint
 from keystoneclient.common import cms
 from keystoneclient import exceptions
 from keystoneclient import session
-import netaddr
 from oslo.config import cfg
 from oslo.serialization import jsonutils
 from oslo.utils import timeutils
@@ -605,7 +604,7 @@ class AuthProtocol(object):
             auth_protocol = self._conf_get('auth_protocol')
             auth_admin_prefix = self._conf_get('auth_admin_prefix')
 
-            if netaddr.valid_ipv6(auth_host):
+            if ':' in auth_host:
                 # Note(dzyu) it is an IPv6 address, so it needs to be wrapped
                 # with '[]' to generate a valid IPv6 URL, based on
                 # http://www.ietf.org/rfc/rfc2732.txt

requirements.txt

@@ -4,7 +4,6 @@
 
 Babel>=1.3
 iso8601>=0.1.9
-netaddr>=0.7.12
 oslo.config>=1.4.0  # Apache-2.0
 oslo.serialization>=1.0.0               # Apache-2.0
 oslo.utils>=1.0.0                       # Apache-2.0