-amupdated submodules to its master/HEAD
changed '/etc/hosts' modification to just to point $HOSTNAME to 127.0.0.1 just in the case it doesn't already
changed 'rvm use' line to set default ruby as the 'rvm current' one which will be the default one downloaded by rvm
changed node's json to use $COOKBOOK_NAME variable in 'run_list'
removed temporal '/tmp/cookbook' dir just in case it exists
updated gecoscc-chef-server-cookbook submodule