Added alert for log goodput flows

scripts/plugins/alerts/network/low_goodput/alert_definitions/alert_flow_low_goodput.lua

@@ -0,0 +1,29 @@
+--
+-- (C) 2019-20 - ntop.org
+--
+
+local alert_keys = require "alert_keys"
+
+-- #######################################################
+
+-- @brief Prepare an alert table used to generate the alert
+-- @param alert_severity A severity as defined in `alert_consts.alert_severities`
+-- @return A table with the alert built
+local function createFlowLowGoodput(goodput_ratio)
+   local built = {
+      alert_type_params = {
+	 goodput_ratio = goodput_ratio
+      }
+   }
+
+   return built
+end
+
+-- #######################################################
+
+return {
+   alert_key = alert_keys.ntopng.alert_flow_low_goodput,
+   i18n_title = "alerts_dashboard.flow_low_goodput",
+   icon = "fas fa-exclamation",
+   creator = createFlowLowGoodput,
+}