Update pbr from 3.0.0 to 3.0.1 (#2486)

requirements/dev.txt

@@ -58,9 +58,9 @@ WebOb==1.7.2 \
 
 # Required by mock
 funcsigs==1.0.2 --hash=sha256:330cc27ccbf7f1e992e69fef78261dc7c6569012cf397db8d3de0234e6c937ca
-pbr==3.0.0 \
-    --hash=sha256:86f0e548dfbdc1ad12559725a66b5e1ca0b2e0744940da1ec89991fd11a2b32b \
-    --hash=sha256:568f988af109114fbfa0525dcb6836b069838360d11732736ecc82e4c15d5c12
+pbr==3.0.1 \
+    --hash=sha256:dfc304262e881066bc675a59a348733af17bee1d57084d9e2a0c96b952a82db7 \
+    --hash=sha256:d7e8917458094002b9a2e0030ba60ba4c834c456071f2d0c1ccb5265992ada91
 
 # Required by responses
 cookies==2.2.1 --hash=sha256:15bee753002dff684987b8df8c235288eb8d45f8191ae056254812dfd42c81d3