roles/ipaclient/tasks/install.yml: Use ipaadmin_keytab for admin keytab

The use od ipaclient_keytab for ipahost is not correct as the admin keytab
needs to be used here.

README.md

@@ -70,6 +70,9 @@ Variables
 **ipaservers** - Group of IPA server hostnames.
  (list of strings, optional)
 
+**ipaadmin_keytab** - The path to the admin keytab used for alternative authentication.
+ (string, optional)
+
 **ipaclient_domain** - The primary DNS domain of an existing IPA deployment.
  (string, optional)
 

roles/ipaclient/tasks/install.yml

@@ -33,7 +33,7 @@
       state: present
       principal: "{{ ipaclient_principal | default('admin') }}"
       password: "{{ ipaclient_password | default(omit) }}"
-      keytab: "{{ ipaclient_keytab | default(omit) }}"
+      keytab: "{{ ipaadmin_keytab | default(omit) }}"
       fqdn: "{{ ansible_fqdn }}"
       lifetime: "{{ ipaclient_lifetime | default(omit) }}"
       random: True