Merge into master from pull request #3837:

src/main/java/net/floodlightcontroller/packet/ARP.java

src/main/java/net/floodlightcontroller/packet/BSN.java

src/main/java/net/floodlightcontroller/packet/BSNPROBE.java

...main/java/net/floodlightcontroller/packet/BasePacket.java

src/main/java/net/floodlightcontroller/packet/Ethernet.java

src/main/java/net/floodlightcontroller/packet/ICMP.java

src/main/java/net/floodlightcontroller/packet/IPacket.java

src/main/java/net/floodlightcontroller/packet/IPv4.java

...t/floodlightcontroller/packet/PacketParsingException.java

src/main/java/net/floodlightcontroller/packet/TCP.java

src/main/java/net/floodlightcontroller/packet/UDP.java

src/test/java/net/floodlightcontroller/packet/ICMPTest.java

src/test/java/net/floodlightcontroller/packet/IPv4Test.java

...test/java/net/floodlightcontroller/packet/PacketTest.java

src/test/java/net/floodlightcontroller/packet/TCPTest.java