Replaced metadata.json with mongodb #130.

nomad/api/repo.py

nomad/api/upload.py

nomad/coe_repo/calc.py

nomad/config.py

nomad/datamodel.py

nomad/files.py

nomad/processing/data.py

tests/conftest.py

tests/processing/test_data.py

tests/test_api.py

tests/test_client.py

tests/test_coe_repo.py

tests/test_datamodel.py

tests/test_files.py

tests/test_migration.py

tests/test_search.py