CrudDispatcher#map should allow concurrent access

[manusa]

Description

Several downstream issues have been reported regarding concurrent access to the attribute set map.

The issue should be fixed upstream to avoid needing synchronized lock access to the map.

Relates to:

• https://github.com/fabric8io/kubernetes-client/pull/3432
• https://github.com/fabric8io/kubernetes-client/issues/3429
• https://github.com/fabric8io/kubernetes-client/pull/2593
• https://github.com/fabric8io/kubernetes-client/issues/2592