(PDB-3077) Update doc reference from logrotate to Logback for rotation
(PDB-3077) Update doc reference from logrotate to Logback for rotation

This commit changes a paragraph in the documentation which had referred
to the configuration of logrotate for logging to instead reference the
use of Logback's own file rotation.

waynr/puppetdb,waynr/puppetdb,rbrw/puppetdb,rbrw/puppetdb,rbrw/puppetdb,waynr/puppetdb,waynr/puppetdb,mullr/puppetdb,rbrw/puppetdb,puppetlabs/puppetdb,mullr/puppetdb,senior/puppetdb,mullr/puppetdb,senior/puppetdb,rbrw/puppetdb,mullr/puppetdb,puppetlabs/puppetdb,puppetlabs/puppetdb,senior/puppetdb,puppetlabs/puppetdb,senior/puppetdb,mullr/puppetdb,puppetlabs/puppetdb