[DM] Update project.py.schema (#796)
[DM] Update project.py.schema (#796)

Too restrictive, does not allow to create service accounts without roles.

Co-authored-by: Adam Ocsvari <57e8491858593b0e9d8f1d2150c08926784960dc@google.com>
GoogleCloudPlatform/cloud-foundation-toolkit,GoogleCloudPlatform/cloud-foundation-toolkit,GoogleCloudPlatform/cloud-foundation-toolkit,GoogleCloudPlatform/cloud-foundation-toolkit,GoogleCloudPlatform/cloud-foundation-toolkit