PLT-5813 support SAML sync via LDAP (#7668)

* PLT-5813 support SAML sync via LDAP

* Cleaning up based on review

config/default.json

@@ -223,6 +223,7 @@
     },
     "LdapSettings": {
         "Enable": false,
+        "EnableSync": false,
         "LdapServer": "",
         "LdapPort": 389,
         "ConnectionSecurity": "",