There is no solution currently supported by IBM, but the procedure described in the following page about running Liberty as a windows service using the Apache Commons Daemon  should work:
          https://developer.ibm.com/answers/questions/7668/liberty-profile-windows-service-apache-commons-daemon/?smartspace=wasdev

Note that the command to run the Jazz Authorization Server (JAS) as a service is slightly different than the one shown in the link above (JAS has a jazz specific wrapper to the Liberty start up/shutdown scripts).

The command would look like this:
prunsrv //IS//WLP --Startup=manual --DisplayName="IBM Jazz Authorization Server" --Description="IBM Jazz Authorization Server based on WebSphere Liberty Profile" ++DependsOn=Tcpip  -LogPath=C:\JAS\wlp\usr\servers\jazzop\logs --StdOutput=auto --StdError=auto --StartMode=exe --StartPath=C:\JAS\wlp --StartImage=C:\JAS\start-jazz.bat --StopMode=exe --StopPath=C:\JAS\wlp --StopImage=C:\JAS\stop-jazz.bat

Where C:\JAS is the Jazz Authorization Server installation directory.