Add optional silent install and config of ldap to devstack

Edited initial ldap entries and olcdb template file as recommended by Brant.

Change-Id: I1404cc5c754f878e32a2d10254840d092211e6e6
diff --git a/files/ldap/manager.ldif.in b/files/ldap/manager.ldif.in
new file mode 100644
index 0000000..e522150
--- /dev/null
+++ b/files/ldap/manager.ldif.in
@@ -0,0 +1,10 @@
+dn: olcDatabase={${LDAP_OLCDB_NUMBER}}hdb,cn=config
+changetype: modify
+replace: olcSuffix
+olcSuffix: dc=openstack,dc=org
+-
+replace: olcRootDN
+olcRootDN: dc=Manager,dc=openstack,dc=org
+-
+${LDAP_ROOTPW_COMMAND}: olcRootPW
+olcRootPW: ${SLAPPASS}