This task can take some time to complete, I would say on the order of several minutes, but if it has been more than 10 minutes you are likely running into the issue that the username/password specified in
ansible/roles/cloudlet/vars/main.yml are incorrect. The elijah-provisioning fabric script which installs the cloudlet library requires a local username and password in order to properly execute. If you edit
ansible/roles/cloudlet/vars/main.yml and change the local_user and local_user_pw variables from 'cloudlet' to the username/password that you log into the machine with, hopefully you will see it complete this step.