Change compute reference to login

Because compute and login nodes are basically the same except login node does not need slurmd and we don't use compute image anywhere. So use it to build login image and change its references in CI script

ansible/group_vars/all

@@ -50,7 +50,6 @@
 # ssh proxy
   enable_ssh_proxy_config: false
   sshpiper_dest_dir: "/opt/sshpiper"
-  fail2ban_cidr_list: "127.0.0.1/8"
 
 # rsyslog
   enable_rsyslog_config: false
@@ -75,3 +74,10 @@
 
 # account app
   account_app_port: 8000
+
+# fail2ban
+  enable_fail2ban: true
+  maxretry: 1
+  findtime: 600
+  bantime: 1200
+  fail2ban_white_list: "127.0.0.1/8"