modulesync 2.8.0

Archlinux: support node_exporter installation as package

Make it possible for elasticsearch exporter to be used even with version before 1.1.0 where breaking changes appear
(see https://github.com/justwatchcom/elasticsearch_exporter/blob/v1.1.0/CHANGELOG.md)

…porter

Make elasticsearch usable with older version

fix duplicate key in data/defaults.yaml

Archlinux: set correct binary name for node_exporter

It's bad practice to allow daemons to modify their own config
files. This pattern seems to be common across this module, and I
cannot think of a good reason why, as there is little chance (say) an
exporter should have to modify its own config file.

This reverts the policy by ensuring only minimal permissions are set
on config files and directories deployed by Puppet. Only two
directories are writable after this change:

 * /var/lib/prometheus
 * /usr/local/share/prometheus

And I'm not even sure about the latter.

make config files readonly to daemons

Expose env_vars to prometheus::pushprox_client class

Allow s3 sources for download uris

Archlinux: Do not manage node_exporter group/user

exporters: set /usr/bin/nologin as shell

user/group: prohibit empty strings

Clean up acceptance spec helper

Addd RHEL8 support / disable timesync for docker images

Add prom command line args and validation

release 7.1.0