add ossec tag

added an ossec tag to the ossec agent tasks.
removed the ossec agent package from the being part of the app role. The ossec agent package already gets installed as part of the ossec_agent role.
added a common role that can be skipped only in the staging environment.
added a app-test role to skip when updating app-armor profiles
moved install fpf repo to role

the fpf repo is required for the app, ossec and agent tasks when not installing those packages locally.

this will allow skipping the common role when testing the app.
removed the distribution_release to the built in ansible codename
Tor is required to be installed prior the securedrop-app-code deb package is installed or the apparmor profile that is part of the securedrop-app-code deb package will error our for the tor abstractions not being present
Merge remote-tracking branch 'upstream/develop' into add-tags-to-speed-staging
Merge remote-tracking branch 'upstream/develop' into add-tags-to-speed-staging
added tags so you can skip building the ossec packages when provisioning app-build
Merge pull request #713 from dolanjs/add-tags-to-speed-staging

Add tags to speed up staging provisioning
Fix path in tails_files C wrapper
Echo confirmation message on success of tails files install