Revert "icinga2x-graylog2: Make API browser work by listening on all interfaces."

This reverts commit 56ec83aa324061eb90dcca31137a0e5c93ee86d0.

It caused timeouts in graylog2-web in some network setups.
icinga2x-graylog2: Use version 1.2 of the check-graylog2-stream package.
icinga2x-graylog2: Update to graylog2 Puppet module 0.8.0.

This allows us to use the "timeout" option for the web interface.
icinga2x-graylog2: Increase timeout for web interface.

This avoids timeout errors which might happen from time to time.
icinga2x-graylog2: Switch graylog2-server API url back to ipaddress.

The rest_listen_uri commit got reverted so this is needed again.