Fix some untranslatable commands in Web UI API Browser

There are some missing translatable docstrings of commands and modules.

Fixes: https://pagure.io/freeipa/issue/7592
Reviewed-By: Tibor Dudlak <tdudlak@redhat.com>

ipaserver/plugins/dns.py

@@ -3550,6 +3550,7 @@ for param in _dns_records:
 
 @register()
 class dnsrecord_split_parts(Command):
+    __doc__ = _('Split DNS record to parts')
     NO_CLI = True
 
     takes_args = (

ipaserver/plugins/internal.py

@@ -19,9 +19,6 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-"""
-Plugins not accessible directly through the CLI, commands used internally
-"""
 from ipalib import Command
 from ipalib import Str
 from ipalib.frontend import Local
@@ -30,6 +27,10 @@ from ipalib.text import _
 from ipalib.util import json_serialize
 from ipalib.plugable import Registry
 
+__doc__ = _("""
+Plugins not accessible directly through the CLI, commands used internally
+""")
+
 register = Registry()
 
 @register()

ipaserver/plugins/join.py

@@ -17,10 +17,6 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-"""
-Joining an IPA domain
-"""
-
 import logging
 
 import six
@@ -31,6 +27,10 @@ from ipalib import errors
 from ipalib import _
 from ipaserver.install import installutils
 
+__doc__ = _("""
+Joining an IPA domain
+""")
+
 if six.PY3:
     unicode = str
 

ipaserver/plugins/session.py

@@ -9,6 +9,10 @@ from ipalib.request import context
 from ipalib.plugable import Registry
 from ipalib.text import _
 
+__doc__ = _("""
+Session Support for IPA
+""")
+
 logger = logging.getLogger(__name__)
 
 register = Registry()