Add ruby 1.9.3-p545 for testing warden & dea

Chef recipes used by warden and dea pull in chruby which relies on
.ruby-version to select the appropriate ruby.

[#71367862]

Temporarily using both p484 and p545 in WTI to get through tests.

Signed-off-by: Michael Fraenkel <fraenkel@us.ibm.com>