HCM Tests leaks connections
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                 Key: HBASE-5053
                 URL: https://issues.apache.org/jira/browse/HBASE-5053
             Project: HBase
          Issue Type: Bug
          Components: test
    Affects Versions: 0.94.0
            Reporter: nkeywal
            Assignee: nkeywal
            Priority: Minor


There are simple leaks and one more complex.

The complex one comes from the fact fact 
HConnectionManager.HConnectionImplementation keeps a *reference* to the 
configuration used for the creation. So if this configuration is updated later, 
the HConnectionKey created initially will differ from the current one. As a 
consequence, the close() will not find the connection anymore in the list, and 
the connection won't be deleted.

I added a warning when a close does not find the connection in the list; but I 
wonder if we should not copy the HConnectionKey instead of keeping a reference.

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