nix: replace python-ldap by ldap

Signed-off-by: Paul Kroeher <paul.kroeher@cyberus-technology.de>

On-behalf-of: SAP paul.kroeher@sap.com

Author: pkr4711

packages/keystone.nix

@@ -35,7 +35,7 @@ let
     pycodestyle
     pymysql
     pysaml2
-    python-ldap
+    ldap
     requests
     stestr
     tempest
@@ -101,7 +101,7 @@ python3Packages.buildPythonPackage (rec {
     oslo-db
     oslotest
     pycodestyle
-    python-ldap
+    ldap
     requests
     tempest
     testresources