Increase default is ready retries

The current number of is ready retries does not work with DSS9000
hardware.  This change doubles the number of retries, which has proven
to work.

Change-Id: I5651acbb22be1cffb2a7f448db6a6975d27ad963

dracclient/constants.py

@@ -12,7 +12,7 @@
 #    under the License.
 
 # iDRAC is ready retry constants
-DEFAULT_IDRAC_IS_READY_RETRIES = 48
+DEFAULT_IDRAC_IS_READY_RETRIES = 96
 DEFAULT_IDRAC_IS_READY_RETRY_DELAY_SEC = 10
 
 # Web Services Management (WS-Management and WS-Man) SSL retry on error