Brief about DMM: DMM [abbr. Dual Mode, Multi-protocol, Multi-instance] is a framework between applications and transport layer of networking stack. This framework can hosts different types of networking stack instances operating on different domains (kernel/user-space) or even with different protocol suites (TCP/IP, RDMA, or others). Application can use different type of protocol stack implementations based on functional/performance requirements. Project Wiki (https://wiki.fd.io/view/DMM)

Test Case Description: DMM has sample application in dmm/app_example folder. We have only one test case right now. Our testcase (SingleCliSer.py) demonstrates single client single server scenario using dmm framework and kernel tcp/ip stack.

This is a basic functional test case. Time taken by the test script(few seconds excluding setup). 

Script gerrit review:

https://gerrit.fd.io/r/#/c/11286/