Updated from global requirements

Change-Id: I2ce6d9920f25ce41cb0ef569534a25beb9f363aa

setup.py

@@ -14,8 +14,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# THIS FILE IS MANAGED BY THE GLOBAL REQUIREMENTS REPO - DO NOT EDIT
 import setuptools
 
 setuptools.setup(
-    setup_requires=['d2to1>=0.2.10,<0.3', 'pbr>=0.5,<0.6'],
-    d2to1=True)
+    setup_requires=['pbr>=0.5.21,<1.0'],
+    pbr=True)