tox: Keeping going with docs

Change-Id: I8351af94c728a26ac3c2d67176c3279348264922

requirements.txt

@@ -1 +1,5 @@
+# The order of packages is significant, because pip processes them in the order
+# of appearance. Changing the order has an impact on the overall integration
+# process, which may cause wedges in the gate later.
+
 pbr>=0.5.21,<1.0

test-requirements.txt

@@ -1,8 +1,12 @@
+# The order of packages is significant, because pip processes them in the order
+# of appearance. Changing the order has an impact on the overall integration
+# process, which may cause wedges in the gate later.
+
 hacking<0.11,>=0.10.0
 oslotest
 
-sphinx!=1.6.6,!=1.6.7,>=1.6.2,<2.0.0;python_version=='2.7' # BSD
-sphinx!=1.6.6,!=1.6.7,!=2.1.0,>=1.6.2;python_version>='3.4' # BSD
+sphinx>=1.8.0,<2.0.0;python_version=='2.7' # BSD
+sphinx>=1.8.0,!=2.1.0;python_version>='3.4' # BSD
 openstackdocstheme>=1.20.0 # Apache-2.0
 testrepository>=0.0.18
 

tools/releasenotes_tox.sh

@@ -2,7 +2,7 @@
 
 rm -rf releasenotes/build
 
-sphinx-build -a -E -W \
+sphinx-build -a -E -W --keep-going \
     -d releasenotes/build/doctrees \
     -b html \
     releasenotes/source releasenotes/build/html