Jenkins job to run pipeline merge & build neo4j & blazegraph datastores

[kevinschaper]

Jenkins job to run KGX merge, create neo4j & blazegraph data images & upload to bucket

• [x] New Yaml to download kgx files
• [x] Upload to date asset dir
• [x] Copy to latest
• [ ] Create neo4j image
• [ ] Create blazegraph image

[sagehrke]

Task four on this list is in issue #183. There is not use case for the Blazegraph task. Closing.