Description of problem: ipa migrate-ds fails with internal error.


Version-Release number of selected component (if applicable):
ipa-server-4.8.0-4.module+el8.1.0+3696+eb4a1e69.x86_64

How reproducible:
Always


Steps to Reproduce:
1. Install IPA server
2. Run ipa migrate-ds  command


Actual results:
Internal error is seen.

[Mon Jul 22 18:07:33.180155 2019] [wsgi:error] [pid 28555:tid 139624469780224]
[remote 10.65.206.140:47746] ipa: DEBUG:
migrate_ds('ldap://master.rhel81.test:3389', '********',
binddn=ipapython.dn.DN('cn=directory manager'),
usercontainer=ipapython.dn.DN('ou=People'),
groupcontainer=ipapython.dn.DN('ou=groups'), userobjectclass=('person',),
groupobjectclass=('groupOfUniqueNames', 'groupOfNames'),
userignoreobjectclass=None, userignoreattribute=None,
groupignoreobjectclass=None, groupignoreattribute=None,
groupoverwritegid=False, schema='RFC2307bis', continue=False, compat=True,
use_def_group=True, scope='onelevel', version='2.233', exclude_users=None,
exclude_groups=None)
[Mon Jul 22 18:07:33.182543 2019] [wsgi:error] [pid 28555:tid 139624469780224]
[remote 10.65.206.140:47746] ipa: DEBUG: retrieving schema for SchemaCache
url=ldapi://%2Fvar%2Frun%2Fslapd-RHEL81-TEST.socket
conn=<ldap.ldapobject.SimpleLDAPObject object at 0x7efcdbed69e8>
[Mon Jul 22 18:07:33.393732 2019] [wsgi:error] [pid 28555:tid 139624469780224]
[remote 10.65.206.140:47746] ipa: ERROR: non-public: ValueError: simple_bind
over insecure LDAP connection
[Mon Jul 22 18:07:33.393752 2019] [wsgi:error] [pid 28555:tid 139624469780224]
[remote 10.65.206.140:47746] Traceback (most recent call last):
[Mon Jul 22 18:07:33.393758 2019] [wsgi:error] [pid 28555:tid 139624469780224]
[remote 10.65.206.140:47746]   File
"/usr/lib/python3.6/site-packages/ipaserver/rpcserver.py", line 368, in
wsgi_execute
[Mon Jul 22 18:07:33.393763 2019] [wsgi:error] [pid 28555:tid 139624469780224]
[remote 10.65.206.140:47746]     result = command(*args, **options)
[Mon Jul 22 18:07:33.393768 2019] [wsgi:error] [pid 28555:tid 139624469780224]
[remote 10.65.206.140:47746]   File
"/usr/lib/python3.6/site-packages/ipalib/frontend.py", line 450, in __call__
[Mon Jul 22 18:07:33.393774 2019] [wsgi:error] [pid 28555:tid 139624469780224]
[remote 10.65.206.140:47746]     return self.__do_call(*args, **options)
[Mon Jul 22 18:07:33.393779 2019] [wsgi:error] [pid 28555:tid 139624469780224]
[remote 10.65.206.140:47746]   File
"/usr/lib/python3.6/site-packages/ipalib/frontend.py", line 478, in __do_call
[Mon Jul 22 18:07:33.393784 2019] [wsgi:error] [pid 28555:tid 139624469780224]
[remote 10.65.206.140:47746]     ret = self.run(*args, **options)
[Mon Jul 22 18:07:33.393789 2019] [wsgi:error] [pid 28555:tid 139624469780224]
[remote 10.65.206.140:47746]   File
"/usr/lib/python3.6/site-packages/ipalib/frontend.py", line 800, in run
[Mon Jul 22 18:07:33.393794 2019] [wsgi:error] [pid 28555:tid 139624469780224]
[remote 10.65.206.140:47746]     return self.execute(*args, **options)
[Mon Jul 22 18:07:33.393799 2019] [wsgi:error] [pid 28555:tid 139624469780224]
[remote 10.65.206.140:47746]   File
"/usr/lib/python3.6/site-packages/ipaserver/plugins/migration.py", line 917, in
execute
[Mon Jul 22 18:07:33.393804 2019] [wsgi:error] [pid 28555:tid 139624469780224]
[remote 10.65.206.140:47746]     ds_ldap.simple_bind(options['binddn'], bindpw)
[Mon Jul 22 18:07:33.393809 2019] [wsgi:error] [pid 28555:tid 139624469780224]
[remote 10.65.206.140:47746]   File
"/usr/lib/python3.6/site-packages/ipapython/ipaldap.py", line 1215, in
simple_bind
[Mon Jul 22 18:07:33.393814 2019] [wsgi:error] [pid 28555:tid 139624469780224]
[remote 10.65.206.140:47746]     raise ValueError('simple_bind over insecure
LDAP connection')
[Mon Jul 22 18:07:33.393822 2019] [wsgi:error] [pid 28555:tid 139624469780224]
[remote 10.65.206.140:47746] ValueError: simple_bind over insecure LDAP
connection

Expected results:
The command should execute without any error.

Additional info: