Fix loading CI images from new airflow-ci location (apache#16187)

Author: potiuk

scripts/ci/docker-compose/integration-kerberos.yml

@@ -18,7 +18,7 @@
 version: "2.2"
 services:
   kdc-server-example-com:
-    image: apache/airflow:krb5-kdc-server-2021.04.28
+    image: apache/airflow-ci:krb5-kdc-server-2021.04.28
     hostname: krb5-kdc-server-example-com
     domainname: example.com
     networks:

scripts/ci/docker-compose/integration-openldap.yml

@@ -18,7 +18,7 @@
 version: "2.2"
 services:
   openldap:
-    image: apache/airflow:openldap-2020.07.10-2.4.50
+    image: apache/airflow-ci:openldap-2020.07.10-2.4.50
     command: "--copy-service"
     environment:
       - LDAP_DOMAIN=example.com