CORD-1446: Work around pip versioning issue involving grpcio and sphinx

Change-Id: I230d342cabbc68aa21a9e7a544ed905bd9ee6095
diff --git a/containers/xos/pip_requirements.txt b/containers/xos/pip_requirements.txt
index c7bcf6e..70289b5 100644
--- a/containers/xos/pip_requirements.txt
+++ b/containers/xos/pip_requirements.txt
@@ -39,6 +39,7 @@
 django-timezones==0.2
 djangorestframework==3.3.3
 dnslib==0.9.6
+docutils==0.13.1
 docker-compose==1.9.0
 docker-py==1.10.6
 docker_pycreds==0.2.1
@@ -54,6 +55,7 @@
 futurist==0.18.0
 google-api-python-client==1.5.3
 greenlet==0.4.10
+sphinx_rtd_theme==0.1.9
 grpcio==1.0.4
 grpcio-tools==1.0.4
 html5lib==0.999