get BIGQUERY_TABLE setting from plstackapi config file
diff --git a/planetstack/planetstack/settings.py b/planetstack/planetstack/settings.py
index d706245..ce13f08 100644
--- a/planetstack/planetstack/settings.py
+++ b/planetstack/planetstack/settings.py
@@ -240,3 +240,5 @@
         },
     }
 }
+
+BIGQUERY_TABLE = getattr(config, "bigquery_table", "demoevents")