Moves validation to separate play in configure playbook
Moves validation to separate play in configure playbook

Let's write the vars to disk before validating them, so that if
validation fails, we still have record of the vars on disk.

heartsucker/securedrop,conorsch/securedrop,ageis/securedrop,ehartsuyker/securedrop,micahflee/securedrop,conorsch/securedrop,micahflee/securedrop,ehartsuyker/securedrop,heartsucker/securedrop,ehartsuyker/securedrop,conorsch/securedrop,ageis/securedrop,heartsucker/securedrop,conorsch/securedrop,ehartsuyker/securedrop,heartsucker/securedrop,micahflee/securedrop,ehartsuyker/securedrop,ageis/securedrop,ageis/securedrop,conorsch/securedrop,ehartsuyker/securedrop,garrettr/securedrop,heartsucker/securedrop,micahflee/securedrop,garrettr/securedrop,garrettr/securedrop,garrettr/securedrop