Add `make lint` target and fix errors that were found

Change-Id: Ibb2886d07e0e1c8a4b8928721a12eb94c01178a0
diff --git a/jjb/api-test.yaml b/jjb/api-test.yaml
index 3369ad5..595369f 100644
--- a/jjb/api-test.yaml
+++ b/jjb/api-test.yaml
@@ -35,6 +35,6 @@
       script-path: 'Jenkinsfile/verify-api-tests-JenkinsFile'
       scm:
         - git:
-           url: '{gerrit-server-url}/cord-tester'
-           branches:
-             - 'master'
+            url: '{gerrit-server-url}/cord-tester'
+            branches:
+              - 'master'