Use exclusively HttpClient 4 in tests, minor test suite fixes

* fix profiles for running tests only for a specific client (REST,MEMCACHED,HOTROD)
* enable running a single test outside of any group
ISPN-3584 Make sure the schema and the XML writer recognize the fact that we support relay properties
Test for HotRod Rolling Upgrade config example
Tests for ISPN-3582 Server does not expose MBean for registering server-side serialization context
ISPN-3587 Add remote query support in ispn server

* Added in last remaining dependencies for class loading
Fix the read-only attribute parsing