Added test cases to validate boot settings in server power operations

Signed-off-by: Anusha Dathatri <adathatr@in.ibm.com>
Change-Id: I0fd3dd742921682206de46ceaabf8362fdca51aa
diff --git a/gui/data/resource_variables.py b/gui/data/resource_variables.py
index ab46cec..efa4d4f 100644
--- a/gui/data/resource_variables.py
+++ b/gui/data/resource_variables.py
@@ -18,6 +18,7 @@
     xpath_select_button_power_on = "//*[@id='power__power-on']"
     xpath_cancel_button = "//button[contains(text(),'Cancel')]"
     xpath_save_setting_button = "//button[contains(text(),'Save settings')]"
+    xpath_save_button = "//button[contains(text(),'Save')]"
 
     xpath_select_button_warm_reboot = \
         "//*[@id='power__warm-boot']"