registrar config remove browses and default_browse

• removed from supplied values when creating registrar config

@jankovicn @fabian.schindler Could you please confirm, if this change does not break any of existing deployments. That would mean where browse types would not be created in init_db and the deployment depends on registrar creating the browse type definitions.

Fixes #10 (closed)

requested review from @fabian.schindler

changed the description

Rendered config looks like this:

      product_types:
      -
        collections:
        - VHR_IMAGE_2015_Level_1
        coverages:
          Pan:
            assets:
            - pan
          RGBNir:
            assets:
            - ms
        filter:
          product_type: NAO_BUN_1A
        name: NAO_BUN_1A
      -
        collections:
        - VHR_IMAGE_2015_Level_3
       ...

merged

mentioned in commit e8e399b2