Upgrade Java Buildpack to v2.0.2

This change updates the Java Buildpack to v2.0.2.  This update
contains changes to ensure that failed DNS lookups cause the buildpack
to assume that there is no Internet connection.

[#67329818]
Merge pull request #113 from nebhale/67329818-java-buildpack-v2.0.2

Upgrade Java Buildpack to v2.0.2