The existing test gearman cert+key combos were mismatched and therefore
invalid. This replaces them with newly generated test data, and moves
them into the test private hostvar files where the production private
data are now housed.
This removes the public production data as well; those certs are now
in the private hostvar files.
Change-Id: I6d7e12e2548f4c777854b8738c98f621bd10ad00