test: convert registry auth test to pytest

This also moves them into the auth package.

endpoints/v2/test/test_v2_tuf.py

@@ -1,15 +1,15 @@
 import pytest
-
 import flask
-from flask_principal import Identity, Principal
 
-from endpoints.v2.v2auth import get_tuf_root 
-from auth import permissions
-from util.security.registry_jwt import QUAY_TUF_ROOT, SIGNER_TUF_ROOT, DISABLED_TUF_ROOT
-  
-from test import testconfig
+from flask_principal import Identity, Principal
 from mock import Mock
 
+from auth import permissions
+from endpoints.v2.v2auth import get_tuf_root
+from test import testconfig
+from util.security.registry_jwt import QUAY_TUF_ROOT, SIGNER_TUF_ROOT, DISABLED_TUF_ROOT
+
+
 
 def admin_identity(namespace, reponame):
   identity = Identity('admin')
@@ -17,24 +17,28 @@ def admin_identity(namespace, reponame):
   identity.provides.add(permissions._OrganizationRepoNeed(namespace, 'admin'))
   return identity
 
+
 def write_identity(namespace, reponame):
   identity = Identity('writer')
   identity.provides.add(permissions._RepositoryNeed(namespace, reponame, 'write'))
   identity.provides.add(permissions._OrganizationRepoNeed(namespace, 'write'))
   return identity
-  
+
+
 def read_identity(namespace, reponame):
   identity = Identity('reader')
   identity.provides.add(permissions._RepositoryNeed(namespace, reponame, 'read'))
   identity.provides.add(permissions._OrganizationRepoNeed(namespace, 'read'))
   return identity
 
+
 def app_with_principal():
   app = flask.Flask(__name__)
   app.config.from_object(testconfig.TestConfig())
-  principal = Principal(app) 
+  principal = Principal(app)
   return app, principal
 
+
 @pytest.mark.parametrize('identity,expected', [
   (Identity('anon'), QUAY_TUF_ROOT),
   (read_identity("namespace", "repo"), QUAY_TUF_ROOT),
@@ -50,8 +54,8 @@ def test_get_tuf_root(identity, expected):
     principal.set_identity(identity)
     actual = get_tuf_root(Mock(), "namespace", "repo")
     assert actual == expected, "should be %s, but was %s" % (expected, actual)
-    
-    
+
+
 @pytest.mark.parametrize('trust_enabled,tuf_root', [
   (True, QUAY_TUF_ROOT),
   (False, DISABLED_TUF_ROOT),