Switch the ejabberd LDAP setup to a new application account

Needs the new directory structure:

```
dn: cn=applications,dc=kosmos,dc=org
objectClass: top
objectClass: organizationalRole
cn: users

dn: ou=kosmos.org,cn=applications,dc=kosmos,dc=org
objectClass: top
objectClass: organizationalUnit
ou: kosmos.org

dn: ou=5apps.com,cn=applications,dc=kosmos,dc=org
objectClass: top
objectClass: organizationalUnit
description: 5apps
ou: 5apps.com

dn: uid=wiki,ou=kosmos.org,cn=applications,dc=kosmos,dc=org
objectClass: simpleSecurityObject
objectClass: account
uid: wiki
userPassword: [snip]

dn: uid=xmpp,ou=kosmos.org,cn=applications,dc=kosmos,dc=org
objectClass: simpleSecurityObject
objectClass: account
uid: xmpp
userPassword: [snip]

dn: uid=xmpp,ou=5apps.com,cn=applications,dc=kosmos,dc=org
objectClass: simpleSecurityObject
objectClass: account
uid: xmpp
userPassword: [snip]

```

And the new ACIs:

```
dn: ou=5apps.com,cn=users,dc=kosmos,dc=org
changetype: modify
replace: aci
aci: (target="ldap:///cn=*,ou=5apps.com,cn=users,dc=kosmos,dc=org")(targetattr="cn || sn || uid || mail || userPassword || nsRole") (version 3.0; acl "xmpp-5apps-read-search"; allow (read,search) userdn="ldap:///cn=xmpp,ou=5apps.com,cn=users,dc=kosmos,dc=org";)
aci: (target="ldap:///cn=*,ou=5apps.com,cn=users,dc=kosmos,dc=org")(targetattr="userPassword") (version 3.0; acl "xmpp-5apps-change-password"; allow (write) userdn="ldap:///cn=xmpp,ou=5apps.com,cn=users,dc=kosmos,dc=org";)
aci: (target="ldap:///cn=*,ou=5apps.com,cn=users,dc=kosmos,dc=org")(targetattr="cn || sn || uid || mail || userPassword || nsRole || objectClass") (version 3.0; acl "xmpp-5apps-read-search"; allow (read,search) userdn="ldap:///uid=xmpp,ou=5apps.com,cn=applications,dc=kosmos,dc=org";)
aci: (target="ldap:///cn=*,ou=5apps.com,cn=users,dc=kosmos,dc=org")(targetattr="userPassword") (version 3.0; acl "xmpp-5apps-change-password"; allow (write) userdn="ldap:///uid=xmpp,ou=5apps.com,cn=applications,dc=kosmos,dc=org";)

dn: ou=kosmos.org,cn=users,dc=kosmos,dc=org
changetype: modify
replace: aci
aci: (target="ldap:///cn=*,ou=kosmos.org,cn=users,dc=kosmos,dc=org")(targetattr="cn || sn || uid || mail || userPassword || nsRole") (version 3.0; acl "xmpp-kosmos-read-search"; allow (read,search) userdn="ldap:///cn=xmpp,ou=kosmos.org,cn=users,dc=kosmos,dc=org";)
aci: (target="ldap:///cn=*,ou=kosmos.org,cn=users,dc=kosmos,dc=org")(targetattr="cn || sn || uid || mail || userPassword") (version 3.0; acl "xmpp-kosmos-read-search"; allow (read,search) userdn="ldap:///cn=wiki,ou=kosmos.org,cn=users,dc=kosmos,dc=org";)
aci: (target="ldap:///cn=*,ou=kosmos.org,cn=users,dc=kosmos,dc=org")(targetattr="userPassword") (version 3.0; acl "xmpp-kosmos-change-password"; allow (write) userdn="ldap:///cn=xmpp,ou=kosmos.org,cn=users,dc=kosmos,dc=org";)
aci: (target="ldap:///cn=*,ou=kosmos.org,cn=users,dc=kosmos,dc=org")(targetattr="cn || sn || uid || mail || userPassword || nsRole || objectClass") (version 3.0; acl "xmpp-kosmos-read-search"; allow (read,search) userdn="ldap:///uid=xmpp,ou=kosmos.org,cn=applications,dc=kosmos,dc=org";)
aci: (target="ldap:///cn=*,ou=kosmos.org,cn=users,dc=kosmos,dc=org")(targetattr="cn || sn || uid || mail || userPassword || objectClass") (version 3.0; acl "xmpp-kosmos-read-search"; allow (read,search) userdn="ldap:///uid=wiki,ou=kosmos.org,cn=applications,dc=kosmos,dc=org";)
aci: (target="ldap:///cn=*,ou=kosmos.org,cn=users,dc=kosmos,dc=org")(targetattr="userPassword") (version 3.0; acl "xmpp-kosmos-change-password"; allow (write) userdn="ldap:///uid=xmpp,ou=kosmos.org,cn=applications,dc=kosmos,dc=org";)
```

Refs #140

site-cookbooks/kosmos-ejabberd/recipes/default.rb

@@ -112,6 +112,8 @@ ldap_base = "cn=users,dc=kosmos,dc=org"
 admin_users = ejabberd_credentials['admins']
 
 hosts.each do |host|
+  ldap_rootdn = "uid=xmpp,ou=#{host[:name]},cn=applications,dc=kosmos,dc=org"
+
   postgresql_database host[:sql_database] do
     owner 'ejabberd'
     action :create
@@ -134,6 +136,7 @@ hosts.each do |host|
               host: host,
               ldap_base: ldap_base,
               ldap_server: ldap_domain,
+              ldap_rootdn: ldap_rootdn,
               ldap_encryption_type: ldap_encryption_type
     notifies :run, "execute[ejabberdctl reload_config]", :delayed
   end