DMQ and User creation is no longer a static operation, it use now getWrapper administration wrapper.

Bug fix: in case of local interaction between the proxy and the destination the ClientMessage is sent in non persistent mode and the client should be notify after the destination reaction. Before this patch if TTL are set the CM could be deleted and the client is blocked, so we remove the expiration date on the CM in case of local sending.

- Fix bug: setting cleaning task period didn't work.
- Use collection framework.
- Fix code formatting

Fix bug: setting cleaning task period didn't work.

Fix a bug in administration of cluster destination through XML scripts (the administration wrapper was not set so at creation so there is an error during next operations).

A bad clock synchronization can cause issues when using messages TTL or receive with timeout.

Javadoc enhancements.