For ipa versions prior to 4.5 it is needed to use ipa-client-install script
as a source for functions. But the script contains a global finally clause
in which the generated ccache file gets removed. Threfore the script is
temporarily copied to ipa_client_install.py and the global finally clause
gets removed from the copy. All this is done in a temporary directory, which
gets removed right after the import has been done.
A Object called options is generated as ipa-client-install and also
ipaclient/install/client.py functions are using this object.
inspect.argspec is used on configure_krb5_conf to find out if the function
requires configure_sssd as an optional argument or in the options object.
Documentation for domain, principal, keytab, ca_cert_file and kinit_attempts
has been added.
ca_certs_file has been renamed to ca_cert_file as it is used in
ipa-client-install.
The module is doing the important part of the code in ipa-client-install
to be able to use ipa-join on the client. get_ca_certs* from client.py are
used as a temporary solution.
