change to use check argument instead of checkNull from the sun tools package
Add cache expiration and event storeVerticesChanged
Add logCacheStats function on DEBUG
Move /vertex/edge/delete to /edge [delete] #422
Only set offline when session expiration if last connection.

Send sessionExpiration message otherwise only to that browser. #423
Don't put divider in graph context menu when no workspace exporters
Fix entity detail pane relationship sections
Fix vertex editor admin plugin setting properties
Fix audit for edges
remove test value
Merge remote-tracking branch 'origin/master' into upgrade-infrastructure
fix servlet api version
Merge branch 'upgrade-infrastructure' into docker