* Denote Openfire 4.2.0-beta

* Bump maven openfire version to 4.2.0-beta

via mvn versions:set -DnewVersion=4.2.0-beta -DartifactId=*  -DgroupId=*

and had to manually edit
 * src/plugins/jingleNodes/pom.xml
 * src/plugins/kraken/pom.xml
 * src/plugins/pom.xml
 * src/plugins/rayo/pom.xml
 * src/plugins/sip/pom.xml

* update changelog and date

* bump beta release date