ipaserver_setup_ds: Fix tasks.create_tmpfiles_dirs call (issue#19) (2nd try)

tasks.create_tmpfiles_dirs only needs IPAAPI_USER as an argument for
version 4.5.4. For 4.5 there is no support for arguments.

IPAAPI_USER is therefore only needed for 4.5.4 in
module_utils/ansible_ipa_server.py