GEODE-7304: Make publish-war and publish-java build scripts more consistent

[jdeppe-pivotal]

Authored-by: Jens Deppe jdeppe@pivotal.io

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For all changes:

• Is there a JIRA ticket associated with this PR? Is it referenced in the commit message?

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[rhoughton-pivot]

This will not work for nested sub-projects, because project.projectDir resolves according to where the including-project lives. I strongly recommend using rootDir for this reason.