Remove test code from package

[dojeda]

I have just realized that this package does not exclude the test from its distributed contents:

ar tvzf ../quetzal-openapi-client/dist/quetzal-openapi-client-0.3.1.tar.gz
drwxr-xr-x  0 david  staff       0 Sep 17 10:50 quetzal-openapi-client-0.3.1/
-rw-r--r--  0 david  staff    1675 Sep 17 10:50 quetzal-openapi-client-0.3.1/PKG-INFO
-rw-r--r--  0 david  staff    9258 Sep 17 10:42 quetzal-openapi-client-0.3.1/README.md
drwxr-xr-x  0 david  staff       0 Sep 17 10:50 quetzal-openapi-client-0.3.1/quetzal/
-rw-r--r--  0 david  staff     171 Jun 15 13:42 quetzal-openapi-client-0.3.1/quetzal/__init__.py
...
...
...
drwxr-xr-x  0 david  staff       0 Sep 17 10:50 quetzal-openapi-client-0.3.1/test/
-rw-r--r--  0 david  staff       0 Jul  2 17:07 quetzal-openapi-client-0.3.1/test/__init__.py
-rw-r--r--  0 david  staff    1036 Jun 15 13:42 quetzal-openapi-client-0.3.1/test/test_authentication_api.py
-rw-r--r--  0 david  staff     925 Jun 15 13:42 quetzal-openapi-client-0.3.1/test/test_base_metadata.py
-rw-r--r--  0 david  staff    3147 Jun 15 13:42 quetzal-openapi-client-0.3.1/test/test_data_api.py
-rw-r--r--  0 david  staff     867 Jun 15 13:42 quetzal-openapi-client-0.3.1/test/test_error.py
-rw-r--r--  0 david  staff     925 Jun 15 13:42 quetzal-openapi-client-0.3.1/test/test_file_contents.py
-rw-r--r--  0 david  staff     959 Jun 15 13:42 quetzal-openapi-client-0.3.1/test/test_metadata_by_family.py
-rw-r--r--  0 david  staff     941 Jun 15 13:42 quetzal-openapi-client-0.3.1/test/test_paginated_files.py
-rw-r--r--  0 david  staff     957 Jun 15 13:42 quetzal-openapi-client-0.3.1/test/test_paginated_queries.py
-rw-r--r--  0 david  staff     981 Jun 15 13:42 quetzal-openapi-client-0.3.1/test/test_paginated_workspaces.py
-rw-r--r--  0 david  staff     973 Jun 15 13:42 quetzal-openapi-client-0.3.1/test/test_pagination_envelope.py
-rw-r--r--  0 david  staff    1322 Jun 15 13:42 quetzal-openapi-client-0.3.1/test/test_public_api.py
-rw-r--r--  0 david  staff     867 Jun 15 13:42 quetzal-openapi-client-0.3.1/test/test_query.py
-rw-r--r--  0 david  staff    1191 Jun 15 13:42 quetzal-openapi-client-0.3.1/test/test_query_api.py
-rw-r--r--  0 david  staff     943 Jun 15 13:42 quetzal-openapi-client-0.3.1/test/test_query_no_results.py
-rw-r--r--  0 david  staff     867 Jun 15 13:42 quetzal-openapi-client-0.3.1/test/test_token.py
-rw-r--r--  0 david  staff     899 Jun 15 13:42 quetzal-openapi-client-0.3.1/test/test_workspace.py
-rw-r--r--  0 david  staff    2583 Jun 15 13:42 quetzal-openapi-client-0.3.1/test/test_workspace_api.py