KUDU-1817. Fix kudu-spark2 artifactId in pom.xml
KUDU-1817. Fix kudu-spark2 artifactId in pom.xml

kudu-spark2 pom.xml is malformed due to a maven shade plugin issue:
dependency-reduced-pom should use shadedArtifactId
(https://issues.apache.org/jira/browse/MSHADE-155)

I upgraded maven-shade-plugin to version 2.4 and fixed the pom.xml.
Additionally, I moved the default properties to a default profile.
This makes the property settings consistent for both versions.

Change-Id: I0dc9ac261a82e13d189bc1be04faea5a9812d518
Reviewed-on: http://gerrit.cloudera.org:8080/5586
Tested-by: Kudu Jenkins
Reviewed-by: Will Berkeley <c74686ab413a71926fc1bc9d16ebfa30e619336a@gmail.com>

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