Description of problem:
I tried to migrate a openldap based directory to FreeIPA, while removing
several objectclasses. --user-ignore-attribute didn't work.

The Problem seems to be, that the LDAPEntry Object entry_attry in migration.py
isn't lowercased while the blacklist is force to lower case by the script.

the problem can be resolved by replacing
        if attr in attr_blacklist:
with:
        if attr.lower() in attr_blacklist:

Version-Release number of selected component (if applicable): 4.0.3 on Fedora
20


How reproducible: use migrate-ds with --user-ignore-attribute

Steps to Reproduce:
1.
2.
3.

Actual results:

error:
Failed user:
  xxx: attribute "shadowLastChange" not allowed
  xxx: attribute "shadowLastChange" not allowed


Expected results:
user is migrated


Additional info: