Github user jburwell commented on the issue:
https://github.com/apache/cloudstack/pull/1888
@rhtyd most Java-based systems do not specific a particular JDK/JRE as a
dependency in their packages in order to allow administrators to pick the
implementation they prefer (e.g. OpenJDK, Sun JDK, IBM JDK, etc). Should we
consider removing those dependencies from ours packages for the same reason?
Also, Travis supports testing [multiple Java
versions](https://blog.travis-ci.com/support_for_multiple_jdks/). If we are
not discontinuing support for 1.7, we should have Travis both 1.7 and 1.8.
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