Fluentd packages in CentOS Opstools SIG repos is very old,
because of old-ish ruby (2.0) packaged with CentOS 7.
On the other hand - TreasureData packages for fluentd are packaged
with embedded ruby as dependencies - so this change moves to those.
Thanks to that we are able to move from fluentd 0.12 to 1.4.2.
Still we need ruby-devel for non-td-agent distros,
because we download monasca output plugin as source and build it
during installation.
* Bump up td.repo to version 3
* Merge sudoers into one file
* Change fluentd plugin install macro to reflect changes
Depends-On: https://review.opendev.org/679209/
Depends-On: https://review.opendev.org/679885/
Change-Id: I40a81103317ac044d9311b2505593056cf313bd2