mongo wait time for inputs test

clmctest/inputs/conftest.py

@@ -35,7 +35,7 @@ def influxdb(telegraf_agent_config, request):
     db =  InfluxDBClient(host=telegraf_agent_config['hosts'][0]['ip_address'], port=8086, database=request.param['database'], timeout=10)
     db.drop_database(request.param['database'])
 
-    # wait 10 seconds for the 1st measurement to arrive from agents before returning
-    time.sleep(15)
+    # wait 20 seconds for the 1st measurement to arrive from agents before returning
+    time.sleep(30)
 
     return db