JCLOUDS-40 Remove last reference to AsyncBlobStore in Swift.
Fix poms so that modernizer doesn't fail on snapshot.
Revert "Fix poms so that modernizer doesn't fail on snapshot."

This reverts commit 889243a677ebba620cc9915f26304091b4dd53bb. The
snapshot repository has now been added to the jclouds-project POM.
See commit 79d4b48 to jclouds/jclouds.