correct time-to-live-seconds and MaxLifetime settings for hazelcast

Description

https://github.com/igniterealtime/Openfire/pull/661

This pull request fixes the issues identified in the post at https://community.igniterealtime.org/message/261078 - i.e. a lack of time-to-live-seconds configuration, and an error when setting the MaxLifetime property

Environment

None
Fixed

Assignee

Dave Cridland

Reporter

Daryl Herzmann