Added module loading support for local clusters.
Added module loading support for local clusters.

Frameworks triggering a local cluster (--master=local) now have module loading
support via slave and master flags (--modules).

Review: https://reviews.apache.org/r/26775

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