Asyncio Client Fixes (2)

[yuce]

Some small and big fixes and improvements to mostly the asyncio client, but some asyncore as well:

• Check the existence of event handlers in *Map proxies.
• Cluster get_member must use the correct variable
• Compact schema send retry, blocking cloud discovery refresh
• Create tasks for conn.close_connection calls.
• Fix ConnectionManager start_connect_all_members task
• Fixed the deadlock in asyncio listener
• Fixed the race condition in ProxyManager.get_or_create
• Fixed the race condition in _handle_successful auth
• Fixed wrong method retries in VC
• Remove the write loop in reactor
• VC put_if_absent must copy the passed document before updating it.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 87.80488% with 15 lines in your changes missing coverage. Please review.
✅ Project coverage is 94.55%. Comparing base (57b5175) to head (e3d074f).

Files with missing lines	Patch %	Lines
hazelcast/internal/asyncio_proxy/map.py	55.55%	8 Missing ⚠️
hazelcast/internal/asyncio_proxy/manager.py	75.00%	4 Missing ⚠️
hazelcast/internal/asyncio_cluster.py	50.00%	1 Missing ⚠️
hazelcast/internal/asyncio_connection.py	98.11%	1 Missing ⚠️
...elcast/internal/asyncio_proxy/vector_collection.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #780      +/-   ##
==========================================
- Coverage   94.58%   94.55%   -0.04%     
==========================================
  Files         393      393              
  Lines       25083    25130      +47     
==========================================
+ Hits        23726    23761      +35     
- Misses       1357     1369      +12     

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