Adding LDAP support for Keystone charm

Change-Id: Ic07622ef2332943479d1e9212f9d968ba6554ead
Signed-off-by: sousaedu <eduardo.sousa@canonical.com>
diff --git a/docker/Keystone/Dockerfile b/docker/Keystone/Dockerfile
index 3880e96..8525cb5 100644
--- a/docker/Keystone/Dockerfile
+++ b/docker/Keystone/Dockerfile
@@ -61,7 +61,7 @@
 # ldap
 # ENV LDAP_AUTHENTICATION_DOMAIN_NAME     no default
 # ENV LDAP_URL                            ldap://localhost
-# ENV LDAP_BIND_USER                      no defauslt
+# ENV LDAP_BIND_USER                      no default
 # ENV LDAP_BIND_PASSWORD                  no default
 # ENV LDAP_USER_TREE_DN                   no default
 # ENV LDAP_USER_OBJECTCLASS               inetOrgPerson