Added support for unavailable replica servers
Add missing `var`.
Merge pull request #1160 from vseventer/patch-1

Add missing `var`.
fixed flaky tests
fix flaky gridstore test
Fix for unavailable replica servers
Ping strategy filters out any non connected servers
Merge branch '1.4' into pingStrategyLongs
merged with disconnected servers
Temp.
Playing with server unavailability marks.