Improve Collection / CoverageView creation procedure

[randomorder]

Currently, in order to setup a new collection and coverage we need to do the following:

• Create Colletion via REST, POST-ing the Collection definition zip file
• Ingest at least one product into the collection
• Create the CoverageView via REST, PUT-ing the JSON definition

Would be nice to simplify the procedure, ideally to do all this in a single step