Fix rounding bug in data api

Symbol names need to match exactly to be rounded properly

metobsapi/data_api.py

@@ -14,10 +14,12 @@ LOG = logging.getLogger(__name__)
 
 
 ROUNDING = {
-    'rel_hum': 0,
-    'wind_direction': 0,
-    'chlorophyll_ysi': 2,
-    'phycocyanin_ysi': 2,
+    'aoss.tower.rel_hum': 0,
+    'aoss.tower.wind_direction': 0,
+    'mendota.buoy.rel_hum': 0,
+    'mendota.buoy.wind_direction': 0,
+    'mendota.buoy.chlorophyll_ysi': 4,
+    'mendota.buoy.phycocyanin_ysi': 4,
 }