Added FUTURE_CALL, DROP_CALL, DROP_CALLS and EXPECT_NO_FUTURE_CALLS.
Added FUTURE_CALL, DROP_CALL, DROP_CALLS and EXPECT_NO_FUTURE_CALLS.

Review: https://reviews.apache.org/r/36462

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