Rescan all HBAs, VMFS volumes and refresh storage summary provided a vCenter cluster.

Sample execution:

[vi-admin@tancredi ~]$ ./rescanAllHBAInCluster.pl --cluster development --server reflex2.primp-industries.com --username primp
Enter password:
Scanning cluster: development ...
        Rescan all HBAs successful for host everest.primp-industries.com.
        Rescan for new VMFS volumes successful for host everest.primp-industries.com.
        Refresh storage information successful for host everest.primp-industries.com.
Scanning cluster complete!