when space is created, add the creator to space as admin

[tcnichol]

Description

Previously, when a space was created using the api, the user that created the space was not added to the space as an admin upon creation. This meant that if a user created a space with a POST request and then used a GET request to get available spaces, the new space would not show up.

To test that this is fixed, create a space using POST (curl or postman) and then do a GET. Note that before the new space did not show up, but now it does.

Fixes #179

Review Time Estimate

• When possible

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My change requires a change to the documentation.
• I have updated the CHANGELOG.md.
• I have signed the CLA
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[bodom0015]

LGTM 👍

Works as expected:

MacBook-Pro:clowder lambert8$ curl localhost:9000/api/spaces -XPOST --header 'Content-Type: application/json' -d '{ "name": "created via API", "description": "I created this via the API" }' --header 'X-Api-Key: d890834f-9b1b-48a6-9935-ba79fa73dd49'
{"id":"60389efbd72872db4b17c3ed"}

MacBook-Pro:clowder lambert8$ curl localhost:9000/api/spaces --header 'Content-Type: application/json' --header 'X-Api-Key: d890834f-9b1b-48a6-9935-ba79fa73dd49'
[{"id":"60389efbd72872db4b17c3ed","name":"created via API","description":"I created this via the API","created":"Fri Feb 26 01:10:51 CST 2021"},
...
}]