Fix compiler (eclipse) warnings: unused imports, unused variables, missing
generics
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Key: ZOOKEEPER-1170
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1170
Project: ZooKeeper
Issue Type: Improvement
Reporter: Thomas Koch
Assignee: Thomas Koch
Priority: Minor
IDE warnings get useless if there are too many of them. This issue + patch
fixes nearly the rest of them.
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