[maven-release-plugin] prepare release 4.0.0-beta-4
[maven-release-plugin] prepare release 4.0.0-beta-4

codenvy/websocket-terminal,codenvy/che-websocket-terminal,codenvy/websocket-terminal,codenvy/websocket-terminal,codenvy/che-websocket-terminal,codenvy/che-websocket-terminal