use slugify function from django (#6826)

requirements.txt

@@ -3,4 +3,3 @@ django-mellon
 python-ldap
 gadjo
 requests
-unidecode

setup.py

@@ -76,7 +76,6 @@ setup(
                       'python-ldap',
                       'gadjo',
                       'requests',
-                      'unidecode'
     ],
     zip_safe=False,
     cmdclass={

uauth/organization/management/commands/sync_federations.py

@@ -5,11 +5,11 @@ import xml.etree.ElementTree as etree
 import requests
 import urlparse
 import re
-import unidecode
 import lasso
 
 from django.conf import settings
 from django.core.management.base import BaseCommand, CommandError
+from django.utils.text import slugify
 
 def md_element_name(tag_name):
     return '{%s}%s' % (lasso.SAML2_METADATA_HREF, tag_name)
@@ -17,10 +17,6 @@ def md_element_name(tag_name):
 def mdui_element_name(tag_name):
     return '{%s}%s' % (SAML2_METADATA_UI_HREF, tag_name)
 
-def slugify(text):
-    text = unidecode.unidecode(text).lower()
-    return re.sub(r'\W+', '-', text)
-
 SAML2_METADATA_UI_HREF = 'urn:oasis:names:tc:SAML:metadata:ui'
 ENTITY_DESCRIPTOR_TN = md_element_name('EntityDescriptor')
 ENTITIES_DESCRIPTOR_TN = md_element_name('EntitiesDescriptor')