New global ansible_ipa_client utils module

With ansible 2.3.1 it is possible to have one place as an additional utils
module to do all the needed steps to be able to generate the environment for
new and older ipa versions.

The library modules are now a lot smaller.

The minimal ansible version has been increased to 2.3.1.

In the future it might now also be possible to have a special
ansible_ipa_client version for ipa < 4.4 in this utils module.

library/ipasssd.py

@@ -112,40 +112,7 @@ import tempfile
 import SSSDConfig
 
 from ansible.module_utils.basic import AnsibleModule
-try:
-    from ipalib.install import sysrestore
-except ImportError:
-    from ipapython import sysrestore
-from ipaplatform.paths import paths
-from ipapython.ipautil import file_exists
-try:
-    from ipaclient.install.client import get_server_connection_interface, \
-        configure_nsswitch_database
-except ImportError:
-    # Create temporary copy of ipa-client-install script (as
-    # ipa_client_install.py) to be able to import the script easily and also
-    # to remove the global finally clause in which the generated ccache file
-    # gets removed. The ccache file will be needed in the next step.
-    # This is done in a temporary directory that gets removed right after
-    # ipa_client_install has been imported.
-    import shutil
-    temp_dir = tempfile.mkdtemp(dir="/tmp")
-    sys.path.append(temp_dir)
-    temp_file = "%s/ipa_client_install.py" % temp_dir
-
-    with open("/usr/sbin/ipa-client-install", "r") as f_in:
-        with open(temp_file, "w") as f_out:
-            for line in f_in:
-                if line.startswith("finally:"):
-                    break
-                f_out.write(line)
-    import ipa_client_install
-
-    shutil.rmtree(temp_dir, ignore_errors=True)
-    sys.path.remove(temp_dir)
-
-    get_server_connection_interface = ipa_client_install.get_server_connection_interface
-    configure_nsswitch_database = ipa_client_install.configure_nsswitch_database
+from ansible.module_utils.ansible_ipa_client import *
 
 def sssd_enable_service(module, sssdconfig, service):
     try: