setup storage API and re-harvest legacy data sources as RAW

Using the new set of harvesting libraries, the data storage API we want to re-harvest RAW data from all legacy data sources and store them witin our system.

For this, the data storage API should be set up and configured correctly to be able to consume the RAW data and provide it back for further processing and provide log entries.

The following endpoint times were harvested in the prototype and should be included as follows

type of endpoint/source	what to do
sitemap harvesting	as is
OAI PMH	as is
GitLab instances	exclude until solution for codemeta.py is
indigo (KIT & Hifis)	either this or atomfeed
atomfeed (KIT & HIFIS)	either this or indigo
DataCIte	as Schema.org base on ROR IDs of centers