Javadoc cleanup for the new public clustering API
[WFLY-2895] Fix NPE if async method with void return type is invoked remotely
[WFLY-2896] Fix possible NPE in link lookup
Merge pull request #5897 from dmlloyd/wfly-2895-async-npe

[WFLY-2895] Fix NPE if async method with void return type is invoked remotely
Merge pull request #5898 from dmlloyd/wfly-2896-link-npe

[WFLY-2896] Fix possible NPE in link lookup
Don't use persistent sessions by default
Merge pull request #5896 from ctomc/undertow

Don't use persistent sessions by default
Merge pull request #5893 from rhusar/javadoc_clustering_api

Javadoc cleanup for the new public clustering API
[WFLY-2864] Controller client module
[WFLY-2864] Application client module
[WFLY-2864] WildFly Clustering EJB Infinispan module
[WFLY-2864] WildFly Clustering Infinispan module
[WFLY-2864] WildFly Clustering JGroups module
[WFLY-2864] WildFly Clustering Server module
[WFLY-2864] WildFly Clustering Web Infinispan module
[WFLY-2864] WildFly Connector (JCA) module
[WFLY-2864] WildFly Controller module
[WFLY-2864] WildFly Core Security module
[WFLY-2864] WildFly Deployment Repository module
[WFLY-2864] WildFly Deployment Scanner module