Implement Python module to harvest metadata from OGC Records and OData APIs

[mario-winkler]

Description

Extend the eodm library with harvesting capabilities for the following APIs:

• OGC Records
• OData

Acceptance criteria

• OGC Records harvest functionality
• OData API harvest functionality

[jankovicgd]

OData waiting on potential review: geopython/eodm#4

Will try to tackle OGC Records next

[jankovicgd]

I have also implemented a simple ogcapi-records catalog/collection and record/item harvesting @kalxas can you review? geopython/eodm#5