Move away the Munin service from Pergamon

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Migrated from T1168 (view on Phabricator)

marked this issue as related to #1166

added System administration priority:Normal labels

• munin0 VM created
• munin service added to munin0, with munstrap alternative template
• legacy pergamon data copied to munin0
• Puppet manifests changed to use munin0 instead of pergamon for the Munin service
• Many useless statistics removed in order to reduce I/O load on the new VM
• All of that done in paring with ardumont@

closed

Some existing Puppet manifests were causing important Apache modules to be removed from former Munin machines no longer providing Munin services. This briefly caused all http/https services on Pergamon to fail but has since been fixed in rSPSITEa1ecf58d5d157d94bcb019a432e221da9a798f34.

mentioned in issue swh/meta#1544 (closed)