Fix prompt when executing the deployment with the password

`sudo -S` reads the password from stdin. The way it was it was executing
the deploy script with the password as the stdin of the pipe.

Now, when password is passed as an argument we aquire a sudo session
executing a command that always work and then prefixing the installation
with sudo.

lib/kickstart-deploy

@@ -1,7 +1,7 @@
 #!/bin/bash -e
 
 [[ "$1" == "--sudo" ]] && prefix="sudo " && shift
-[[ "$1" == "--password" ]] && shift && prefix="echo \"$1\" | sudo -S " && shift
+[[ "$1" == "--password" ]] && shift && prefix="echo \"$1\" | sudo -S true && sudo " && shift
 
 target=$1
 [ "$target" ] || echo "Please, provide an ssh target"