attempt to fix gem install issues with aws gems
attempt to fix gem install issues with aws gems

There was a bad release of an AWS gem this attempts to pin to solve the issue.

Signed-off-by: Ben Abrams <b1c1d8736f20db3fb6c1c66bb1455ed43909f0d8@benabrams.it>

chef-cookbooks/aws,opscode-cookbooks/aws