setting default for addons server.rb addons logic fails with Nil error if there are no addons specified.
setting default for addons
server.rb addons logic fails with Nil error if there are no addons specified.

Signed-off-by: Alex Vinyar <60c6d277a8bd81de7fdde19201bf9c58a3df08f4@getchef.com>

vinyar/chef-ingredient,vinyar/chef-ingredient