Fix Ruby + RVM provisioning

Author: jpadilla

scripts/provisioning/ruby.sh

@@ -2,19 +2,16 @@
 
 SSH_USER=${SSH_USERNAME:-vagrant}
 
-export HOME=/home/${SSH_USER}
-
-RVM_PATH=${HOME}/.rvm
-
+su ${SSH_USER} <<EOF
 echo "==> Trusting Michal Papis"
 curl -sSL https://rvm.io/mpapis.asc | gpg --import -
 
 echo "==> Installing RVM"
 curl -sSL https://get.rvm.io | bash -s stable
+source ~/.rvm/scripts/rvm
 
 echo "==> Installing Ruby 2.1"
-source ${RVM_PATH}/scripts/rvm
-rvm use --install 2.1
+rvm use --install --default 2.1
+EOF
 
-chown -R ${SSH_USER}:${SSH_USER} ${RVM_PATH}
-export HOME=/home/root
+chown -R ${SSH_USER}:${SSH_USER} /home/${SSH_USER}