Added missing element click for server power

Resolves  openbmc/openbmc-test-automation#1478

Change-Id: Ib1023c30e06c31792a5991f1c628aa125a9ebb6c
Signed-off-by: Rahul Maheshwari <rahulmaheshwari@in.ibm.com>
diff --git a/gui/obmc_gui/data/resource_variables.py b/gui/obmc_gui/data/resource_variables.py
index 2cd2a4a..c49d8a1 100644
--- a/gui/obmc_gui/data/resource_variables.py
+++ b/gui/obmc_gui/data/resource_variables.py
@@ -89,6 +89,9 @@
     yes = "1"
     No = "2"
 
+    # GUI header elements locators.
+    xpath_select_server_power = "//a[@href='#/server-control/power-operations']"
+
     # Server health elements locators.
     xpath_select_server_health = "//*[@id='header__wrapper']/div/div[3]/a[2]"
     xpath_server_health_text =  \