Update version of samsungac.test pom
MiOS: Only change Item state during incremental updates from MiOS Unit

Change values only during incremental updates from MiOS Unit, to avoid Rule execution upon MiOS restart.
Move to using UnDefType.NULL for Number and Date Items, when the value comes in as the empty String.
Force the Character-Set on the MiOS JSON Response stream to UTF-8, for i18n, since MiOS doesn't apply it in their Response headers.
Fix setting the right value in newly added (MiosUnit) parameter, as identified by @watou during review.
Added functionality to set baud rate of the serial port on initialization: /dev/ttyACM0@115200 will init the port with a baud rate of 115200.
Backward compability is given, as if no baud rate is specified, like /dev/ttyACM0 the serial binding defaults to 9600 bauds.
MAX! Binding improved discovery of the Cube 

fix for error on first message when no config is provided.

Signed-off-by: Marcel Verpaalen <marcel@verpaalen.com>
Merge pull request #1889 from mrguessed/mios-patch-refresh

MiOS: Only change Item state during incremental updates from MiOS Unit
Merge pull request #1897 from wishmoooop/master

[Serial] Baud rate selection on serial binding as parameter
Merge pull request #1902 from marcelrv/discoveryImprovement

MAX! Binding improved discovery of the Cube
Merge pull request #1887 from dominicdesu/samsungAcTestVersionFix

Update version of samsungac.test pom
add SamsungAc Test to build