[autotest] Add migration for table to track job handoff
am: 1229194107

Change-Id: I181c18a7555b127f7f9ac4fb74605c292e15e211
diff --git a/frontend/migrations/120_add_job_handoff_table.py b/frontend/migrations/120_add_job_handoff_table.py
new file mode 100644
index 0000000..67e0eda
--- /dev/null
+++ b/frontend/migrations/120_add_job_handoff_table.py
@@ -0,0 +1,13 @@
+UP_SQL = """
+CREATE TABLE afe_job_handoffs (
+  job_id int(11) NOT NULL,
+  PRIMARY KEY (job_id),
+  CONSTRAINT job_fk FOREIGN KEY (job_id)
+    REFERENCES afe_jobs(id)
+    ON DELETE CASCADE
+) ENGINE=INNODB;
+"""
+
+DOWN_SQL = """
+DROP TABLE afe_job_handoffs;
+"""