OAK-516 Create LdapLoginModule based on ExternalLoginModule

- add some docu

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1566801 13f79535-47bb-0310-9956-ffa450edef68
OAK-516 Create LdapLoginModule based on ExternalLoginModule

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1566802 13f79535-47bb-0310-9956-ffa450edef68
OAK-516 Create LdapLoginModule based on ExternalLoginModule

- create new bundle for auth-ldap

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1566804 13f79535-47bb-0310-9956-ffa450edef68
OAK-516 Create LdapLoginModule based on ExternalLoginModule (wip)

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1566805 13f79535-47bb-0310-9956-ffa450edef68