concurrency fix
add a new entryListenerRequest for c++ client to be able to add sqlRequestListener
small update
Fixed null indexing test
fixes #1142
null check for loaded values
fixed test to use test instance factory
Merge pull request #1144 from enesakar/master-issue1142

fixes #1142
Merge pull request #1116 from ahmetmircik/concurrencyBugFix

minor concurrency fix
Merge pull request #1137 from sancar/MapAddListenerRequestSql/master

add a new entryListenerRequest for c++ client to be able to add sqlReque...