SYN-67: Finish up implementing new database schema management

synapse/storage/schema/delta/14/upgrade_appservice_db.py

@@ -0,0 +1,20 @@
+import json
+
+
+def run_upgrade(cur):
+    cur.execute("SELECT id, regex FROM application_services_regex")
+    for row in cur.fetchall():
+        try:
+            print "checking %s..." % row[0]
+            json.loads(row[1])
+        except ValueError:
+            # row isn't in json, make it so.
+            string_regex = row[1]
+            new_regex = json.dumps({
+                "regex": string_regex,
+                "exclusive": True
+            })
+            cur.execute(
+                "UPDATE application_services_regex SET regex=? WHERE id=?",
+                (new_regex, row[0])
+            )