Updated from global requirements

Change-Id: Ia0fa327c39f51ca8184fd0ea8602760d696b9008

doc/requirements.txt

@@ -8,7 +8,7 @@ sphinxcontrib-blockdiag>=1.5.4 # BSD
 sphinxcontrib-nwdiag>=0.9.5 # BSD
 sphinxcontrib-seqdiag>=0.8.4 # BSD
 docutils>=0.11 # OSI-Approved Open Source, Public Domain
-sphinx!=1.6.6,>=1.6.2 # BSD
+sphinx!=1.6.6,<1.7.0,>=1.6.2 # BSD
 graphviz!=0.5.0,>=0.4 # MIT License
 openstackdocstheme>=1.18.1 # Apache-2.0
 sadisplay>=0.4.8 # BSD

test-requirements.txt

@@ -18,4 +18,4 @@ doc8>=0.6.0 # Apache-2.0
 bandit>=1.1.0 # Apache-2.0
 tempest>=17.1.0 # Apache-2.0
 # Required for pep8 - doc8 tests
-sphinx!=1.6.6,>=1.6.2 # BSD
+sphinx!=1.6.6,<1.7.0,>=1.6.2 # BSD