Added an equals method to the HardwareVersion class.
Added an equals method to the HardwareVersion class.

Signed-off-by: Diego Escalona <2cc07d4527ddb8161307b5e41bc6a82cc360f0ff@digi.com>

brucetsao/XBeeJavaLibrary,digidotcom/XBeeJavaLibrary,GUBotDev/XBeeJavaLibrary