[XBJAPI-121] removed duplicated calls to sendAndCheckXBeePacket method.
[XBJAPI-121] removed duplicated calls to sendAndCheckXBeePacket method.

https://jira.digi.com/browse/XBJAPI-121

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

brucetsao/XBeeJavaLibrary,GUBotDev/XBeeJavaLibrary,digidotcom/XBeeJavaLibrary