Fixed automountkey code review issues.

Fixed several issues found during code review and change
AutomountkeyModule to use IPAAnsibleModule instead of deprecated
FreeIPABaseModule.

playbooks/automount/automoutkey-absent.yml

@@ -0,0 +1,12 @@
+---
+- name: Playbook to manage an automount key
+  hosts: ipaserver
+
+  tasks:
+  - name: Ensure autmount key is present
+    ipaautomountkey:
+      ipaadmin_password: SomeADMINpassword
+      location: TestLocation
+      mapname: TestMap
+      key: TestKey
+      state: absent