ipaserver: Add support for pki_config_override

The addtion is not oly adding the config setting, but also fixing the
deployment without the setting as functions and methods have been changed
for pki_config_override.

There is a new setting for the ipaserver role:

ipaserver_pki_config_override

roles/ipaserver/module_utils/ansible_ipa_server.py

@@ -101,6 +101,10 @@ if NUM_VERSION >= 40500:
     from ipaserver.install.server.install import (
         check_dirsrv, validate_admin_password, validate_dm_password,
         write_cache)
+    try:
+        from ipaserver.install.dogtaginstance import PKIIniLoader
+    except ImportError:
+        PKIIniLoader = None
     try:
         from ipaserver.install.installutils import default_subject_base
     except ImportError: