Add LDAP support to keystone Dockerfile
Add LDAP support to keystone Dockerfile

Currently, the keystone docker image doesn't support LDAP/AD
which is a common to manage users and group for identity
management and authentication.

This change adds ldappool to the builds.

Change-Id: Ida5a58f6c57cd173642f0a801dc9ecd84ded55e8
Closes-Bug: #1600586
Signed-off-by: Dave Walker (Daviey) <a88b7dcd1a9e3e17770bbaa6d7515b31a2d7e85d@daviey.com>

mrangana/kolla,dardelean/kolla-ansible,stackforge/kolla,GalenMa/kolla,rahulunair/kolla,rahulunair/kolla,intel-onp/kolla,nihilifer/kolla,dardelean/kolla-ansible,GalenMa/kolla,mrangana/kolla,coolsvap/kolla,stackforge/kolla,intel-onp/kolla,nihilifer/kolla,mandre/kolla,openstack/kolla,coolsvap/kolla,openstack/kolla,coolsvap/kolla,dardelean/kolla-ansible,mandre/kolla,mandre/kolla,stackforge/kolla