ClientResponse contains Data as response from now on
removing Listener fixed via a base-class
added listener-reconnect test
test fixed with assertEventually
Merge pull request #1750 from gurbuzali/fix-client-listener/3.x-master

ClientResponse contains Data as response from now on
Merge branch 'master' of github.com:hazelcast/hazelcast into fix-client-credentials/3.x-master

Conflicts:
hazelcast-client/src/test/java/com/hazelcast/client/ClientIssueTest.java