Submit configurable has to be boolean

portal/rest/schemas.py

@@ -172,7 +172,7 @@ class ProjectSchema(BaseSchema, NamedSchema, Schema):
     """
     assignment_url = fields.Str(required=False, allow_none=True)
     submit_instructions = fields.Str(required=False, allow_none=True)
-    submit_configurable = fields.Str(required=False, allow_none=True)
+    submit_configurable = fields.Bool(required=False, allow_none=True)
     config = NESTED('ProjectConfig',
                     exclude=('id', '_submissions_allowed_from',
                              '_submissions_allowed_to', '_archive_from'))

tests/rest/test_project.py

@@ -43,6 +43,7 @@ def test_create(rest_service, client):
     assert len(cpp_updated.projects) == cpp_projects + 1
     assert new_project['name'] == "new_project"
     assert new_project['id']
+    assert new_project['submit_configurable'] == True
     rest_tools.assert_project_in(cpp_updated.projects, new_project)