RC4 is fairly out of date. I wonder if it is possible to remove it from the apache list of available cipher suites available. I know FireFox is moving towards disallowing RC4 (with some exceptions) in the near future, so will hopefully have some protection on the browser end soon also.
Assuming you are referring to Apache HTTP server...the KB article posted in the OP has the following advice:
HP Project and Portfolio Management Center Server and External Web Servers
If you are using an external (third-party) Web server with PPM in order to encrypt PPM communications with HTTPS (TLS/SSL), you must consult with the third-party vendor for information on how to resolve this vulnerability.