More XSD issues.

[Gary P Cole <Gary.P.Cole@Sun.COM>]

1. Rename elements of type PSOIdentifierType from 'pso' to 'psoId'
in password capability and suspend capability.

2. Camel-case 'oneLevel', 'subTree' and 'maxReturn' in search capability.

3. Rename "state" namespace to "suspend" for suspend capability.

4. The 'iterate' operation must be synchronous.
- The provider is already queueing the result set; it is unfair to ask 
the provider also to queue the results for individual 'iterate' operations.
- Asynchronous iteration would complicate maintaining the result set.
- Asynchronous iteration precludes a desirable optimization (e.g., to 
localize iteration of a buffered result).

5. The "active" attribute of ActiveResponse should be optional.
- in case of error, any value of "active" could be misleading.