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/ipadiscovery.py

@@ -150,25 +150,7 @@ import socket
 
 from six.moves.configparser import RawConfigParser
 from ansible.module_utils.basic import AnsibleModule
-from ipapython.version import NUM_VERSION, VERSION
-if NUM_VERSION < 40400:
-    raise Exception("freeipa version '%s' is too old" % VERSION)
-if NUM_VERSION < 30201:
-    # See ipapython/version.py
-    IPA_MAJOR,IPA_MINOR,IPA_RELEASE = [ int(x) for x in VERSION.split(".", 2) ]
-    IPA_PYTHON_VERSION = IPA_MAJOR*10000 + IPA_MINOR*100 + IPA_RELEASE
-else:
-    IPA_PYTHON_VERSION = NUM_VERSION
-from ipaplatform.paths import paths
-try:
-    from ipaclient.install import ipadiscovery
-except ImportError:
-    from ipaclient import ipadiscovery
-try:
-    from ipalib.install.sysrestore import SYSRESTORE_STATEFILE
-except ImportError:
-    from ipapython.sysrestore import SYSRESTORE_STATEFILE
-
+from ansible.module_utils.ansible_ipa_client import *
 
 def get_cert_path(cert_path):
     """
@@ -198,7 +180,7 @@ def is_client_configured():
 
     return (os.path.isfile(paths.IPA_DEFAULT_CONF) and
             os.path.isfile(os.path.join(paths.IPA_CLIENT_SYSRESTORE,
-                                        SYSRESTORE_STATEFILE)))
+                                        sysrestore.SYSRESTORE_STATEFILE)))
 
 def get_ipa_conf():
     """