Updated from global requirements

Change-Id: I6e2e3b012d571a997d0b8333feee082e542c6a2f

requirements.txt

@@ -2,6 +2,6 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-pbr>=1.6 # Apache-2.0
+pbr>=1.8 # Apache-2.0
 
 diskimage-builder!=1.6.0,!=1.7.0,!=1.7.1,>=1.1.2 # Apache-2.0

test-requirements.txt

@@ -5,5 +5,5 @@
 bashate>=0.2 # Apache-2.0
 hacking<0.11,>=0.10.0
 
-sphinx!=1.3b1,<1.3,>=1.2.1 # BSD
-oslosphinx!=3.4.0,>=2.5.0 # Apache-2.0
+sphinx!=1.3b1,<1.4,>=1.2.1 # BSD
+oslosphinx>=4.7.0 # Apache-2.0