graphviz pkg should be same for both edxapp and jenkins-worker.

playbooks/roles/edxapp/defaults/main.yml

@@ -778,7 +778,6 @@ edxapp_debian_pkgs:
   # (only needed if wheel files aren't available)
   - s3cmd
   - pkg-config
-  - graphviz-dev
   # for scipy, do not install
   # libopenblas-base, it will cause
   # problems for numpy

playbooks/roles/edxapp_common/defaults/main.yml

@@ -7,7 +7,7 @@ edxapp_common_role_name: edxapp_common
 edxapp_common_debian_pkgs:
     - build-essential
     - gfortran
-    - graphviz
+    - graphviz-dev
     - liblapack-dev
     - libmysqlclient-dev
     - libxml2-dev