newer eqiad servers really have 16 cores, give them 60 maxclients

Change-Id: Icd44f2bb57a87a746c870d350845ddda349b8f57
Setup logrotation for elasticsearch.

Also remove some log files that are confusing.

Change-Id: Icbb1cb49e28cb0b662309ac3ef3efd6420300e77
Merge "newer eqiad servers really have 16 cores, give them 60 maxclients" into production