Accidental refactor, split out legacy.py into separate sumodules and update all call sites.

data/model/health.py

@@ -0,0 +1,25 @@
+import logging
+
+from data.database import TeamRole
+from util.config.validator import validate_database_url
+
+
+logger = logging.getLogger(__name__)
+
+
+def check_health(app_config):
+  # Attempt to connect to the database first. If the DB is not responding,
+  # using the validate_database_url will timeout quickly, as opposed to
+  # making a normal connect which will just hang (thus breaking the health
+  # check).
+  try:
+    validate_database_url(app_config['DB_URI'], {}, connect_timeout=3)
+  except Exception:
+    logger.exception('Could not connect to the database')
+    return False
+
+  # We will connect to the db, check that it contains some team role kinds
+  try:
+    return bool(list(TeamRole.select().limit(1)))
+  except:
+    return False