Cleaning up test/users/ferguson futures.

Sung pointed out that I wasn't using the right
format for my .future files - updating to do that.

I also remove the vol_call.chpl test since 'volatile'
isn't part of the language anymore.



git-svn-id: http://svn.code.sf.net/p/chapel/code/trunk@23689 3a8e244f-b0f2-452b-bcba-4c88e055c3ca
Fix two more future files



git-svn-id: http://svn.code.sf.net/p/chapel/code/trunk@23690 3a8e244f-b0f2-452b-bcba-4c88e055c3ca