fix wrong calls to partisan_peer_service_manager:myself/1
fix wrong calls to partisan_peer_service_manager:myself/1

- partisan_peer_service_manager:myself/1 returns a map containing the nodename whereas partisan_peer_service_manager:mynode/1 returns the nodename
- all state sets are constructed using nodenames
- The issue is that all set operations remove myself/1 and not mynode/1 and as a result the node is not effectively removing itself from the sets which means it would try to broadcast and or perform exchanges with itself.

Signed-off-by: Alejandro M. Ramallo <b6154369b0a4c0ea5058f92b158024642ed0e87c@leapsight.com>

lasp-lang/partisan