#234: azuremonitor webhook support for JSON payload with data.propert… (#235)
#234: azuremonitor webhook support for JSON payload with data.propert… (#235)

* #234: azuremonitor webhook support for JSON payload with data.properties|properties = null

* #236: azuremonitor new format creates service as string literal, but it should be array

alerta/alerta-contrib,alerta/alerta-contrib,alerta/alerta-contrib