Added GUI automation test cases to test shutdown operation

Test cases added:
    - Verify Orderly Shutdown
    - Verify Immediate Shutdown

Change-Id: Id50dbb568e1d87b773905717d2acaca3b0a75c88
Signed-off-by: manashsarma <manashsarma@in.ibm.com>
diff --git a/gui/data/resource_variables.py b/gui/data/resource_variables.py
index 1efeedc..55faa26 100644
--- a/gui/data/resource_variables.py
+++ b/gui/data/resource_variables.py
@@ -136,7 +136,7 @@
     xpath_server_power_header = "//*[@data-test-id='appHeader-container-power']"
     xpath_refresh_button = "//*[@data-test-id='appHeader-button-refresh']"
     xpath_network_page_header = "//h1[contains(text(), 'Network settings')]"
-    xpath_sol_header = "//h1[contains(text(), "Serial over LAN console")]"
+    xpath_sol_header = "//h1[contains(text(), 'Serial over LAN console')]"
 
     # xpath for health menu
     xpath_health_menu = "//button[@aria-controls='health-menu']"