This update completes https://jira.duraspace.org/browse/DPS-88:
it adds  Manifest REST API call to Durastore.  Essentially
what happened here is that the mill-jpa-repo module was moved over
from the mill project, the manifest rest and resource classes were moved
from duraboss to durastore, and a new ManifestGeneratorImpl was written
that works with the ManifestStore. This new setup depends on a property in the
CATALINA_OPTS pointing to a properties file containing the properties specified
in mill-jpa-repo/src/test/resources/mill-config.properties. The property that
must be set is: -Dduracloud.properties.path=/path/to/props.