Java Buildpack 2.1.1

This change updates the Java Buildpack to version 2.1.1.  Version
2.1.1 fixes a bug running Spring Boot applications.

Both the online and offline buildpacks are updated as part of this
change.
Merge remote-tracking branch 'origin/pr/366' into develop

Signed-off-by: Eric Malm <emalm@pivotallabs.com>
Fix names of java buildpack blobs.

[#70188610]

Signed-off-by: Eric Malm <emalm@pivotallabs.com>