Make buildpack less chatty by default. Fix create script warnings with pack.

[BarDweller]

Suppress maven downloading/downloaded messages by default, remove verbose list of copied libs (used for debug).

Add new buildpacks env var that can be used to re-enable the maven transfer messages if required. 'MAVEN_ENABLE_TRANSFER_PROGRESS'

Fix warnings for deprecated usage of pack cli args by create script.

[quintesse]

Thanks Ozzy! 👍