[echonetlite] Initial contribution (#11999)

* First implementation of Echonet Lite Java Bindings.  Only supports Mitsubishi Home Heat Pumps.

Signed-off-by: Michael Barker <mikeb01@gmail.com>

bundles/pom.xml

@@ -110,6 +110,7 @@
     <module>org.openhab.binding.dwdpollenflug</module>
     <module>org.openhab.binding.dwdunwetter</module>
     <module>org.openhab.binding.easee</module>
+    <module>org.openhab.binding.echonetlite</module>
     <module>org.openhab.binding.ecobee</module>
     <module>org.openhab.binding.ecotouch</module>
     <module>org.openhab.binding.ecowatt</module>