Config: store fr_org_names.json in application/run

Change path hard-coded in frdatacollator and default setting in
rapidconnect's config/app_config.yml.dist to store fr_org_names in
/opt/rapidconnect/application/run/fr_org_names.json

Goes well with a cron job invoking:

PATH=/home/$USER/.rbenv/bin:/home/$USER/.rbenv/shims:$PATH ; \
cd /home/rapid/rapidconnect/frdatacollator ;                 \
bundle exec ruby /home/rapid/rapidconnect/frdatacollator/collator.rb \
cp /opt/rapidconnect/application/run/fr_org_names.json.new   \
   /opt/rapidconnect/application/run/fr_org_names.json
Status: add new /status URL for Loadbalancer check

Add a /status URL that returns either 200 or 404 useful for a check by a
load-balancer.

If settings.status_disabled_file is set and the file exists, then this
instance is marked down and returns 404 at the /status URL (but still
handles all other requests normally).  This marks it as off-line for the
load balancer performing the check.

The status_disabled_file name defaults to:
    '/opt/rapidconnect/application/run/disabled'
GitIgnore: add rapidconnect/run to .gitignore
Administration: do not display secret

Do not display the secret on service detail page.
Registration: approval email: user email template

Include a template for notifying users in the email template sent to
administrators when a service is registered.

Include an alternate zendesk URL in that template.

Also include an alternate zendesk URL in the service display page.