SEBA-566 Add linting and fix errors in olt-service

Change-Id: I5f766180242714673500199eb55509286489b60b
diff --git a/Makefile b/Makefile
index 74fb7e5..47ae8c9 100644
--- a/Makefile
+++ b/Makefile
@@ -52,7 +52,7 @@
 docker-push:
 	docker push ${DOCKER_IMAGENAME}
 
-test: test-unit test-migration
+test: test-unit test-migration test-xproto
 
 test-unit:
 	tox
@@ -60,7 +60,7 @@
 venv-service:
 	virtualenv $@;\
     source ./$@/bin/activate ; set -u ;\
-    pip install -r requirements.txt xosmigrate~=3.0.1
+    pip install -r requirements.txt xosmigrate~=3.2.1
 
 create-migration: venv-service
 	source ./venv-service/bin/activate; set -u;\
@@ -70,6 +70,10 @@
 	source ./venv-service/bin/activate; set -u;\
     cd xos; xos-migrate --xos-dir ${XOS_DIR} --services-dir ${SERVICES_DIR} -s ${SERVICE_NAME} --check
 
+test-xproto: venv-service
+	source ./venv-service/bin/activate; set -u;\
+    xosgenx --lint --strict xos/synchronizer/models/volt.xproto
+
 clean:
 	find . -name '*.pyc' | xargs rm -f
 	rm -rf \