fix the way to handle repo key for Debian like system
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Key: BIGTOP-481
URL: https://issues.apache.org/jira/browse/BIGTOP-481
Project: Bigtop
Issue Type: Bug
Components: Debian
Affects Versions: 0.3.0
Reporter: Johnny Zhang
Fix For: 0.3.0
current bigtop package test for lucid doesn't import the key, hence the package
installed is not authenticated.
http://bigtop01.cloudera.org:8080/view/Bigtop-hadoop-0.23/job/Bigtop-hadoop-0.23-packagetest/label=lucid-slave/23/consoleFull
search message "WARNING: The following packages cannot be authenticated!"
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