Rule is not executed when no event name is passed

[kubawolanin]

Environment / device: openHAB 2.0 Build #905 / RaspberryPI 3B with openHABian

Steps to reproduce:

1. Create a new rule responding to the event channel, e.g.

   rule "Tide Dash button pressed"
   when
   Channel "amazondashbutton:dashbutton:Tide:press" triggered
   then
   sendNotification("some@email.com", "Amazon button pressed!")
   sendCommand(Vacuum_Dock, ON)
   end

   or

   rule "Xiaomi Switch"
   when
    Channel "mihome:sensor_switch:<ID>:button" triggered
   then
    var actionName = receivedEvent.getEvent()
    switch(actionName) {
        case "CLICK": {
            <ACTION>
        }
        case "DOUBLE_CLICK": {
            <ACTION>
        }
        case "LONG_CLICK_PRESS": {
            <ACTION>
        }
        case "LONG_CLICK_RELEASE": {
            <ACTION>
        }
    }
   end

2. Try to trigger the events and see the results

Expected result: The rule is triggered and performed actions should be logged in the console.

Actual result: The rule doesn't trigger, nothing is being logged.

Note that both rules worked for me before I updated the distro to the latest one.

When I pass event name to the when section, e.g.

Channel "mihome:sensor_switch:<ID>:button" triggered CLICK

everything works properly as expected.

[sjsf]

It looks like #3267 broke it. @triller-telekom could you please fix it?

[sjsf]

Oh, sorry, it was NOT this PR... My bad! Thanks for having a look anyway.

[triller-telekom]

Indeed it wasn't my fault. But I fixed it anyway :)