Tcp and Udp Header Fixed & Inc/Dec Ports Testcases

[ankiroy8]

resolves #10, #9, #8, #7, #6 issues

[ANISH-GOTTAPU]

Validations are missing for all the tests as mentioned below in the tests, only tx/rx validation is done by validation is missing for header properties.

Validation

• Push configuration
• Start capture on rx port
• Start transmit on tx port
• Wait until following is as expected,
  • Frames tx/rx, bytes tx/rx and transmit state in flow metrics
• Fetch capture and ensure following is as expected,
  • ethernet.ether_type
  • ipv4.protocol, ipv4.total_length
  • tcp.src_port, tcp.dst_port, tcp.length
  • size of each frame
  • (best effort) checksum of all headers

[ANISH-GOTTAPU]

closing this as addressed in #23