ApplicationRoles seed and domain

atst/domain/application_roles.py

@@ -0,0 +1,15 @@
+from atst.database import db
+from atst.models.application_role import ApplicationRole
+
+
+class ApplicationRoles(object):
+    @classmethod
+    def create(cls, user, application, permission_sets):
+        application_role = ApplicationRole(user=user, application_id=application.id)
+
+        application_role.permission_sets = permission_sets
+
+        db.session.add(application_role)
+        db.session.commit()
+
+        return application_role