dna plugin: use global configuration for replica communication

With 389ds/389-ds-base#6124, DNA plugin will be
able to pick up dnaRemoteBindMethod and dnaRemoteConnProtocol from the
global plugin entry and apply to all server entries automatically. We do
not need anymore to wait until the server configuration entry is created
and update it explicitly.

Related: 389ds/389-ds-base#6123

Signed-off-by: Alexander Bokovoy <abokovoy@redhat.com>

install/share/dna.ldif

@@ -38,4 +38,9 @@ dn: cn=Distributed Numeric Assignment Plugin,cn=plugins,cn=config
 changetype: modify
 replace: nsslapd-pluginEnabled
 nsslapd-pluginEnabled: on
-
+-
+add: dnaRemoteBindMethod
+dnaRemoteBindMethod: SASL/GSSAPI
+-
+add: dnaRemoteConnProtocol
+dnaRemoteConnProtocol: LDAP

ipaserver/install/plugins/update_dna_shared_config.py

@@ -53,6 +53,11 @@ def get_shared_cfg(self, plugin_name):
         else:
             logger.debug('Found DNA config %s', dna_config_base)
 
+        remote_bind_method = entry.single_value.get("dnaRemoteBindMethod")
+        if remote_bind_method is not None:
+            logger.error(
+                "dnaRemoteBindMethod is set on the global DNA entry already.")
+            return None
         sharedcfgdn = entry.single_value.get("dnaSharedCfgDN")
         if sharedcfgdn is not None:
             sharedcfgdn = DN(sharedcfgdn)