Move block cache parameters and references into single CacheConf class
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                 Key: HBASE-4422
                 URL: https://issues.apache.org/jira/browse/HBASE-4422
             Project: HBase
          Issue Type: Improvement
          Components: io
            Reporter: Jonathan Gray
            Assignee: Jonathan Gray
             Fix For: 0.92.0


>From StoreFile down to HFile, we currently use a boolean argument for each of 
>the various block cache configuration parameters that exist.  The number of 
>parameters is going to continue to increase as we look at compressed cache, 
>delta encoding, and more specific L1/L2 configuration.  Every new config 
>currently requires changing many constructors because it introduces a new 
>boolean.

We should move everything into a single class so that modifications are much 
less disruptive.

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