[2.3.x] + fix issue #1575
https://java.net/jira/browse/GRIZZLY-1575

"ConnectorHandler/SocketConnectorHandler API changes broke GF sso_failover test"
[2.3.x] + minor cleanup
[2.3.x] Incremental changes for https://java.net/jira/browse/GRIZZLY-1574 (Fix object Builders to avoid unexpected object modification).
[2.3.x] + fix javadocs
[2.3.x] + update the version of bom pom
[2.3.x] More transport refactoring.