Add userClass attribute for hosts

This new freeform host attribute will allow provisioning systems
to add custom tags for host objects which can be later used for
in automember rules or for additional local interpretation.

Design page: http://www.freeipa.org/page/V3/Integration_with_a_provisioning_systems
Ticket: https://fedorahosted.org/freeipa/ticket/3583

tests/test_xmlrpc/test_host_plugin.py

@@ -700,6 +700,7 @@ class test_host(Declarative):
                 dict(
                     description=u'Test host 2',
                     l=u'Undisclosed location 2',
+                    userclass=[u'webserver', u'mailserver'],
                     force=True,
                 ),
             ),
@@ -715,6 +716,7 @@ class test_host(Declarative):
                     objectclass=objectclasses.host,
                     ipauniqueid=[fuzzy_uuid],
                     managedby_host=[fqdn2],
+                    userclass=[u'webserver', u'mailserver'],
                     has_keytab=False,
                     has_password=False,
                 ),
@@ -722,6 +724,27 @@ class test_host(Declarative):
         ),
 
 
+        dict(
+            desc='Retrieve %r' % fqdn2,
+            command=('host_show', [fqdn2], {}),
+            expected=dict(
+                value=fqdn2,
+                summary=None,
+                result=dict(
+                    dn=dn2,
+                    fqdn=[fqdn2],
+                    description=[u'Test host 2'],
+                    l=[u'Undisclosed location 2'],
+                    krbprincipalname=[u'host/%s@%s' % (fqdn2, api.env.realm)],
+                    has_keytab=False,
+                    has_password=False,
+                    managedby_host=[fqdn2],
+                    userclass=[u'webserver', u'mailserver'],
+                ),
+            ),
+        ),
+
+
         # This test will only succeed when running against lite-server.py
         # on same box as IPA install.
         dict(