Adding full support for integrating Keystone via LDAP. Enables
support for managing all LDAP related Keystone options.
- Add two examples of LDAP configuration, although LDAP environments
are highly variable, these will help get everyone started
- Modify the keystone::ldap class to support all LDAP related options
- Check sane defaults in the keystone::ldap class to hopefully reduce mistakes
- Add a dependency on the python-ldap package
- Modify the LDAP test to match the new class
- Make the default-tenant optional since some LDAP backends do not
support this
Change-Id: Ie6879eb4816fd2b906f72cac8deb3b62bd4b2430
