Requested changes

- only warn about failure to find a matching ePerson if canSelfRegister
is false
- tell LGTMbot everything is fine with the redirect
- remove comments about nonexistent ORCID login code

dspace-api/src/main/java/org/dspace/authenticate/OidcAuthenticationBean.java

@@ -137,8 +137,12 @@ public class OidcAuthenticationBean implements AuthenticationMethod {
             return ePerson.canLogIn() ? logInEPerson(context, ePerson) : BAD_ARGS;
         }
 
-        LOGGER.warn("Self registration is currently disabled for OIDC, and no ePerson could be found for email: {}",
-            email);
+        // if self registration is disabled, warn about this failure to find a matching eperson
+        if (! canSelfRegister()) {
+            LOGGER.warn("Self registration is currently disabled for OIDC, and no ePerson could be found for email: {}",
+                email);
+        }
+
         return canSelfRegister() ? registerNewEPerson(context, userInfo, email) : NO_SUCH_USER;
     }