re: 1.6.0 release

[Bruce Schuchardt]

A couple of people have reported running into GEODE-5085 
<https://issues.apache.org/jira/browse/GEODE-5085>, which prevents a 
server from rejoining the cluster if it gets kicked out and a 
SecurityManager has been configured.

Is this something we could get into the 1.6 release?  The fix is a 
single commit and it's been through precheckin testing a few times now.