Move port mapping isolator configuration settings to file local scope for easier sharing.
Move port mapping isolator configuration settings to file local scope
for easier sharing.

Review: https://reviews.apache.org/r/34558

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