library/ipadiscovery.py: Compatibilty to ipa 4.4 and later, new version check

freeipa 4.4 is the first version that supports all needed functions.
Therefore a check has been added to make sure that ipadiscovery fails for
versions before 4.4.

The python bindings of ipa versions before 4.6 are having a different
structure.

library/ipadiscovery.py

@@ -162,9 +162,16 @@ if NUM_VERSION < 30201:
 else:
     IPA_PYTHON_VERSION = NUM_VERSION
 from ipapython.dn import DN
+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
-from ipaplatform.paths import paths
+except ImportError:
+    from ipapython.sysrestore import SYSRESTORE_STATEFILE
+
 
 def get_cert_path(cert_path):
     """