mesos: don't use internal zookeeper on Yosemite.

Closes #32965.
mesos: update 0.20.1 bottle.

Closes #32988.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
Pup 0.3.1

Taking inspiration from the structure provided by Library/Forumla/terraform.rb
this forumla builds the `pup` html query utility.
Remove explicit hg build dependency
pup: add 0.3.1 bottle.