Github user pferrel commented on the issue:
https://github.com/apache/incubator-predictionio-template-java-ecom-recommender/pull/6
the PR is fine, but this can be solved partially with the current
templates. For instance why not support both the previous defaults (those used
in 0.11.0) AND the latest defaults. This could be by leaving 2 build.sbts in
the project, one for 0.10.0, one for 0.11.0. Better yet @dszeto says we can now
build with sbt, which means we can have the optional libs in a single build.sbt
controlled by CLI.
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