Upgrade the Java Client to 1.0.5

This commit upgrades the version of the Java client used by the buildpack
system tests. The upgrade fixes several problems including a HTTP issue and
should result in much more stable system test runs.

See:
https://github.com/cloudfoundry/cf-java-client/issues/222
https://www.pivotaltracker.com/n/projects/816799/stories/78116662

[#79112530]