reset: Calling with too many lockspaces is a usage error
    
    Previously we complained about ignoring lockspaces, but continue the
    operation as usaual, so another program running the sanlk-reset tool
    cannot detect the usage error.
    
    Now this will fail with exit code 2 and this message:
    
        too many lockspaces (max 64)
    
    Signed-off-by: Nir Soffer <nsoffer@redhat.com>