Bump up version of ldap docker image

To fix an issue where the old version did not
run in M1 arch

(cherry picked from commit 7d78f04)
(cherry picked from commit b371775)

Author: MarcialRosales

selenium/bin/components/mock-auth-backend-ldap

@@ -28,7 +28,7 @@ start_mock-auth-backend-ldap() {
     --publish 389:389 \
     --publish 636:636 \
     -v ${AUTH_BACKEND_LDAP_DIR}:/config \
-    osixia/openldap:1.2.1
+    osixia/openldap:1.5.0
 
   wait_for_message mock-auth-backend-ldap "starting"
   docker exec mock-auth-backend-ldap ldapadd \