Developer docs: updates AppArmor profile manipulation
Developer docs: updates AppArmor profile manipulation

In general these docs are bit out of date, mostly because we haven't
updated the AppArmor profiles in quite some time. The staging
environment does not mount the /vagrant directory, so updated the fetch
commands to use Ansible ad-hoc commands to pull back the updated
profiles.

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