Fix regression in Projects.create

A new project's creator was not being assigned a role in the project's
environments.

atst/domain/environments.py

@@ -21,9 +21,13 @@ class Environments(object):
 
     @classmethod
     def create_many(cls, project, names):
+        environments = []
         for name in names:
             environment = Environment(project=project, name=name)
-            db.session.add(environment)
+            environments.append(environment)
+
+        db.session.add_all(environments)
+        return environments
 
     @classmethod
     def add_member(cls, environment, user, role):
@@ -31,8 +35,6 @@ class Environments(object):
             user=user, environment=environment, role=role
         )
         db.session.add(environment_user)
-        db.session.commit()
-
         return environment
 
     @classmethod

atst/domain/projects.py

@@ -14,10 +14,9 @@ class Projects(object):
         project = Project(workspace=workspace, name=name, description=description)
         db.session.add(project)
 
-        Environments.create_many(project, environment_names)
-
-        for environment in project.environments:
-            Environments.add_member(user, environment, user)
+        environments = Environments.create_many(project, environment_names)
+        for environment in environments:
+            Environments.add_member(environment, user, "owner")
 
         db.session.commit()
         return project