[COOK-2524] Check for debian and skip yum

Yum is not so tasty for us Debian folks.  Indeed it is not kosher.
We could end up in Debian hell!

Took the original statement as including yum and moved it to a catch all
within the operating system support test.  Tested for debian and ubuntu
during this same loop and simply removed yum as a dependency.

It ain't too pretty but it will mean I don't have to have an extraneous
cookbook laying around :-).