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/redfish/extended/test_occ_power.robot b/redfish/extended/test_occ_power.robot
index 3efc077..61fc3ee 100644
--- a/redfish/extended/test_occ_power.robot
+++ b/redfish/extended/test_occ_power.robot
@@ -53,7 +53,7 @@
 
     ${occ_count_before}=  Count OCC Object Entry
     Verify OCC State  ${1}
-    Redfish Host Reboot
+    RF SYS GracefulRestart
     Verify OCC State  ${1}
     ${occ_count_after}=  Count OCC Object Entry
     Should be Equal  ${occ_count_before}  ${occ_count_after}
diff --git a/redfish/extended/test_os_reboot.robot b/redfish/extended/test_os_reboot.robot
index f2ce7a5..ad2316a 100644
--- a/redfish/extended/test_os_reboot.robot
+++ b/redfish/extended/test_os_reboot.robot
@@ -31,7 +31,7 @@
     # Note: Host Reboot is implemented by the OBMC Boot Test tool.
     # OBMC Boot Test will take the necessary steps to get the OBMC
     # to a host powered on state before attempting the Host Reboot.
-    Repeat Keyword  ${BOOT_LOOP_COUNT} times  Redfish Host Reboot
+    Repeat Keyword  ${BOOT_LOOP_COUNT} times  RF SYS GracefulRestart
 
 *** Keywords ***
 
diff --git a/redfish/systems/test_power_operations.robot b/redfish/systems/test_power_operations.robot
index 6fc7c22..bcfc854 100644
--- a/redfish/systems/test_power_operations.robot
+++ b/redfish/systems/test_power_operations.robot
@@ -46,7 +46,7 @@
     [Documentation]  Verify Redfish host graceful restart operation.
     [Tags]  Verify_Redfish_Host_GracefulRestart
 
-    Redfish Host Reboot
+    RF SYS GracefulRestart
 
 
 Verify Redfish BMC PowerOff