Disabling getZenossRevision() gives a significant performance boost to the Zenos ...

We have found that changing ZenossInfo.getZenossRevision() to return a null string unconditionally gives a significant performance boost to the Zenoss web UI. This method forks and run an external shell to collect the output of "svn info", and this is fairly expensive. getZenossRevision() is called by getZenossVersion(), which is called very frequently (8 times just logging in and viewing the device inventory). The results of getZenossVersion() are used to generate