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]
Stop all processes in staging script on timeout

* Ensures that child processes created by system()
calls also get killed in case of timeout error.

Signed-off-by: Kai Zhang <kaizhang@cn.ibm.com>
No longer need to create vagrant box locally

Signed-off-by: Abhijit Hiremagalur <abhi@pivotallabs.com>
Merge pull request #113 from nebhale/67329818-java-buildpack-v2.0.2

Upgrade Java Buildpack to v2.0.2
Auto-merge remote-tracking branch 'upstream/master'