Print exception message when failed to move to trash.
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Key: HADOOP-7748
URL: https://issues.apache.org/jira/browse/HADOOP-7748
Project: Hadoop Common
Issue Type: Bug
Affects Versions: 0.20.204.0
Reporter: Liyin Liang
Priority: Trivial
Fix For: 0.20.205.0
When failed to move to trash, the client should print exception message.
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