Product versions support in XcpServerDiscoverer.java

[Venkata SwamyBabu Budumuru]

Hi,

Currently XcpServerDiscoverer.java is coded to support each individual version 
of XenSever based on XenSever version. In fact, CS is only talking to XAPI 
hence, can we just rely on XAPI version rather the XenServer version. This 
approach will avoid changing XcpSserverDiscoverer.java for every minor release 
of XenServer.

Thanks,
SWAMY