refactor!: drop run_device_action; the media controls are methods (0.2.0)

run_device_action dispatched play, pause, stop, next/previous track,
set_volume:N and toggle_mute by string and returned
{success, action, message} instead of the DeviceActionResultDict its
contract names. The typed methods it called (play(), set_volume(), ...)
are the interface; napalm-device-types deprecates run_device_action.

BREAKING CHANGE: run_device_action is removed.

Closes #3

tests/test_sonos.py

@@ -171,37 +171,11 @@ class TestSonosDriver:
         assert zone["model_name"] == "Sonos One"
         assert zone["ip_address"] == "192.168.1.100"
 
-    def test_run_device_action_play(self):
-        result = self.driver.run_device_action("play")
-        assert result["success"] is True
-        assert result["action"] == "play"
+    def test_the_media_controls_are_methods_not_a_string_dispatch(self):
+        """run_device_action returned another shape than its contract and is gone;
+        play(), set_volume() and the others are called directly (netOrk #1105)."""
+        assert not hasattr(type(self.driver), "run_device_action")
+        self.driver.play()
+        self.driver.set_volume(42)
         self.mock_device.play.assert_called_once()
-
-    def test_run_device_action_pause(self):
-        result = self.driver.run_device_action("pause")
-        assert result["success"] is True
-        self.mock_device.pause.assert_called_once()
-
-    def test_run_device_action_stop(self):
-        result = self.driver.run_device_action("stop")
-        assert result["success"] is True
-        self.mock_device.stop.assert_called_once()
-
-    def test_run_device_action_set_volume(self):
-        result = self.driver.run_device_action("set_volume:42")
-        assert result["success"] is True
         assert self.mock_device.volume == 42
-
-    def test_run_device_action_set_volume_invalid(self):
-        result = self.driver.run_device_action("set_volume:abc")
-        assert result["success"] is False
-
-    def test_run_device_action_toggle_mute(self):
-        result = self.driver.run_device_action("toggle_mute")
-        assert result["success"] is True
-        assert self.mock_device.mute is True
-
-    def test_run_device_action_unknown(self):
-        result = self.driver.run_device_action("foobar")
-        assert result["success"] is False
-        assert "Unknown" in result["message"]