Fall back to 9001 if 9023 is not available
Fall back to 9001 if 9023 is not available

This is for backwards compat purposes. Example: stork client
  is updated but px is still pre 2.9 (i.e. does not support
  port 9023)

Signed-off-by: Mudassir Latif <d78ccf51d9f363c78c60211739ee496d7cc0cf5f@purestorage.com>

libopenstorage/openstorage,libopenstorage/openstorage,libopenstorage/openstorage