a part is not an object, keep track of it separately.
EUCA-8699, fixing bad head bucket and head object requests
Merge branch 'testing' of git.eucalyptus-systems.com:eucalyptus into team/storage/mpu
fixed imports.
EUCA-8672: pad encryption data
           also revert the changes that used Base64.standard, as it breaks the existing installations
correctly finalize part entity.
clean up duplicate parts. This adds functionality to reap old/duplicate parts.
Create download manifest for import tasks.

Fixes for: EUCA-8558
Merge branch 'testing' of git.eucalyptus-systems.com:eucalyptus into testing
Merge branch 'testing' of git.eucalyptus-systems.com:eucalyptus into testing