Add openldap test

Change-Id: I4c408ad88c8beb36b2db6ae3a336345421ba0143
Related-PROD: PROD-23241
diff --git a/requirements.txt b/requirements.txt
index 38b0da6..eea162a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,3 +5,4 @@
 python-jenkins==0.4.11
 pygerrit2==2.0.6
 gitpython
+python-ldap