Update managers.py

updating the old (orange) ELIXIR AAI login button with the new (grey) Life Science Login button (location 1/2; new link)

lib/galaxy/authnz/managers.py

@@ -39,7 +39,7 @@
 # Note: This if for backward compatibility. Icons can be specified in oidc_backends_config.xml.
 DEFAULT_OIDC_IDP_ICONS = {
     "google": "https://developers.google.com/identity/images/btn_google_signin_light_normal_web.png",
-    "elixir": "https://lifescience-ri.eu/fileadmin/lifescience-ri/media/Images/login-grey-wide.jpg.png",
+    "elixir": "https://lifescience-ri.eu/fileadmin/lifescience-ri/media/Images/button-login-small.png",
     "okta": "https://www.okta.com/sites/all/themes/Okta/images/blog/Logos/Okta_Logo_BrightBlue_Medium.png",
 }