Dashboard login page assert string fix

Fixes the asserted string in login_page test so it is not failing when header
tag gets new attributes

Change-Id: I88c52ab5c95269fc42c281915b101f4e2e8e0c00
diff --git a/tempest/scenario/test_dashboard_basic_ops.py b/tempest/scenario/test_dashboard_basic_ops.py
index 875a1d9..14f70c7 100644
--- a/tempest/scenario/test_dashboard_basic_ops.py
+++ b/tempest/scenario/test_dashboard_basic_ops.py
@@ -42,7 +42,7 @@
 
     def check_login_page(self):
         response = urllib2.urlopen(CONF.dashboard.dashboard_url)
-        self.assertIn("<h3>Log In</h3>", response.read())
+        self.assertIn("Log In", response.read())
 
     def user_login(self):
         self.opener = urllib2.build_opener(urllib2.HTTPCookieProcessor())