Sebastien Deleuze 96da77ef75 Avoid ConcurrentModificationException ...

Removal of cached destination is now moved outside the for loop
that removes subscriptions to avoid ConcurrentModificationException.

Also since updateCache is a LinkedHashMap with accessOrder=true,
a simple access with updateCache.get() modify the map.
By iterating over updateCache.entrySet(), we avoid this update.

Issue: SPR-11755

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..

main/java

Avoid ConcurrentModificationException

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test

Avoid ConcurrentModificationException

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