Added ability to set framework capabilities in 'mesos-execute'.
Added ability to set framework capabilities in 'mesos-execute'.

Review: https://reviews.apache.org/r/49657/

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