Updated 1.0 CHANGELOG about MESOS-5834.
Updated 1.0 CHANGELOG about MESOS-5834.

Review: https://reviews.apache.org/r/50368

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