fix wrong pygraphviz library paths causing service graph to not appear
diff --git a/xos/configurations/common/Dockerfile.common b/xos/configurations/common/Dockerfile.common
index 5329142..03b479a 100644
--- a/xos/configurations/common/Dockerfile.common
+++ b/xos/configurations/common/Dockerfile.common
@@ -48,7 +48,7 @@
 RUN pip install django-ipware
 RUN pip install django-encrypted-fields
 RUN pip install python-keyczar
-RUN pip install pygraphviz
+RUN pip install pygraphviz --install-option="--include-path=/usr/include/graphviz" --install-option="--library-path=/usr/lib/graphviz/"
 RUN pip install dnslib
 
 RUN DEBIAN_FRONTEND=noninteractive apt-get install -y python-keystoneclient