Update redfish host graceful restart boot type

Changes:
      - Modify "Redfish Host Reboot" to "RF SYS GracefulRestart".
      - Update lib and test cases with new boot type name.

Change-Id: I8fe9c9569bb20810604a792263eb9f76eec66d16
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/data/boot_lists/OS_reboot b/data/boot_lists/OS_reboot
index 28eaec6..f023a49 100755
--- a/data/boot_lists/OS_reboot
+++ b/data/boot_lists/OS_reboot
@@ -8,6 +8,6 @@
 Auto Reboot (mfg)
 Host Reboot
 Host Reboot (mfg)
-Redfish Host Reboot
-Redfish Host Reboot (mfg)
+RF SYS GracefulRestart
+RF SYS GracefulRestart (mfg)
 RF SYS ForceRestart