Added test for CNI port-mapper plugin.
Added test for CNI port-mapper plugin.

Review: https://reviews.apache.org/r/53264/

dforsyth/mesos,Aman-Jain-14/customizedMesos,neilconway/mesos,zmalik/mesos,yuquanshan/customizedMesos,yuquanshan/customizedMesos,jpeach/mesos,verizonlabs/mesos,asamerh4/mesos,craimbert/mesos,craimbert/mesos,reneploetz/mesos,jpeach/mesos,andschwa/mesos,verizonlabs/mesos,jpeach/mesos,neilconway/mesos,Gilbert88/mesos,chhsia0/mesos,andschwa/mesos,yuquanshan/customizedMesos,yuquanshan/customizedMesos,chhsia0/mesos,yuquanshan/customizedMesos,kaysoky/mesos,andschwa/mesos,kaysoky/mesos,dforsyth/mesos,Aman-Jain-14/customizedMesos,gsantovena/mesos,andschwa/mesos,reneploetz/mesos,verizonlabs/mesos,yuquanshan/customizedMesos,gsantovena/mesos,zmalik/mesos,Gilbert88/mesos,jpeach/mesos,abudnik/mesos,neilconway/mesos,andschwa/mesos,gsantovena/mesos,reneploetz/mesos,asamerh4/mesos,verizonlabs/mesos,jpeach/mesos,verizonlabs/mesos,asamerh4/mesos,Gilbert88/mesos,reneploetz/mesos,neilconway/mesos,chhsia0/mesos,reneploetz/mesos,gsantovena/mesos,jpeach/mesos,craimbert/mesos,dforsyth/mesos,jpeach/mesos,Aman-Jain-14/customizedMesos,chhsia0/mesos,craimbert/mesos,Aman-Jain-14/customizedMesos,neilconway/mesos,abudnik/mesos,verizonlabs/mesos,dforsyth/mesos,Aman-Jain-14/customizedMesos,zmalik/mesos,reneploetz/mesos,neilconway/mesos,abudnik/mesos,craimbert/mesos,yuquanshan/customizedMesos,abudnik/mesos,gsantovena/mesos,zmalik/mesos,asamerh4/mesos,zmalik/mesos,kaysoky/mesos,dforsyth/mesos,dforsyth/mesos,abudnik/mesos,Gilbert88/mesos,kaysoky/mesos,andschwa/mesos,asamerh4/mesos,chhsia0/mesos,verizonlabs/mesos,zmalik/mesos,Gilbert88/mesos,asamerh4/mesos,abudnik/mesos,abudnik/mesos,gsantovena/mesos,kaysoky/mesos,zmalik/mesos,chhsia0/mesos,craimbert/mesos,neilconway/mesos,kaysoky/mesos,andschwa/mesos,reneploetz/mesos,craimbert/mesos,Aman-Jain-14/customizedMesos,asamerh4/mesos,gsantovena/mesos,Aman-Jain-14/customizedMesos,Gilbert88/mesos,kaysoky/mesos,Gilbert88/mesos,dforsyth/mesos,chhsia0/mesos