BMC web GUI failure fix

Changes:
   - Update resource.robot power on wait logic.
   - Update header test suite XPATH and DateTime params.

Change-Id: Ia56ca882c17dfa658e64d51055b6b1704e56d079
Signed-off-by: Anusha Dathatri <adathatr@in.ibm.com>
diff --git a/gui/lib/resource.robot b/gui/lib/resource.robot
index 071793b..0760587 100644
--- a/gui/lib/resource.robot
+++ b/gui/lib/resource.robot
@@ -272,7 +272,7 @@
     [Documentation]  Power on the host using GUI.
 
     Controller Server Power Click Button  power__power-on
-    Page Should Contain  Running
+    Wait Until Page Contains  Running   timeout=30s
 
 Verify Display Content
     [Documentation]  Verify text content display.