ipaclient/tasks/install.yml: Removed default(omit) for bool variables

default(omit) is not needed for bool values, as these need to be set either
way.

roles/ipaclient/tasks/install.yml

@@ -267,8 +267,8 @@
       hostname: "{{ result_ipaclient_test.hostname }}"
       subject_base: "{{ result_ipaclient_api.subject_base }}"
       principal: "{{ ipaadmin_principal | default(omit) }}"
-      mkhomedir: "{{ ipaclient_mkhomedir | default(omit) }}"
-      ca_enabled: "{{ result_ipaclient_api.ca_enabled | default(omit) }}"
+      mkhomedir: "{{ ipaclient_mkhomedir }}"
+      ca_enabled: "{{ result_ipaclient_api.ca_enabled }}"
       on_master: "{{ ipaclient_on_master }}"
 
   - name: Install - Configure SSH and SSHD