proxy: Just save the error and continue
Don't pause the queue instead pop from heap
Don't replay the same queue item twice
Set an uuid on all queue items and remove pause

Instead of pausing the queue, we pop from heap on getNext and save
on successful send. To ensure queue items on not replayed twice, we
add a uuid to all queue items, and the proxy then keeps a log of
replayed entries.
Add node-uuid as dependency
test: Fix test broken by refactor
v0.11.0