Refactor POM files
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Key: HAMA-496
URL: https://issues.apache.org/jira/browse/HAMA-496
Project: Hama
Issue Type: Improvement
Components: build
Affects Versions: 0.3.0
Reporter: Edward J. Yoon
Assignee: Edward J. Yoon
Fix For: 0.4.0
1. Remove shade plugin from examples and yarn modules.
2. Mark yarn as a alpha version.
3. Remove 'copy-dependencies' from yarn module.
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