feat: Load LDAP domain from config.json instead of command line argument

imageroot/bin/setup-ldap

@@ -30,6 +30,7 @@ import sys
 import agent
 import subprocess
 from agent.ldapproxy import Ldapproxy
+import json
 
 # Execute occ command
 # It returns the process exit code and output
@@ -41,11 +42,10 @@ def occ(args):
 def set_ldap(k, v):
     return occ(["ldap:set-config", "s01", k, v])
 
-if len(sys.argv) < 2:
-    print("setup-ldap: no argument given", file=sys.stderr)
-    sys.exit(1)
+with open('config.json', 'r') as cf:
+    config = json.loads(cf.read())
+cdomain = config.get("domain")
 
-cdomain = sys.argv[1]
 commands = []
 
 if not cdomain: