Tweaks to outcome import / error model

References OUT-1997
References OUT-1534

Test Plan:
- QA-CR

Change-Id: Id6a204e7f3309510ae28a37f687edf364e6e263c
Reviewed-on: https://gerrit.instructure.com/142341
Reviewed-by: Cody Cutrer <cody@instructure.com>
Reviewed-by: Augusto Callejas <acallejas@instructure.com>
Product-Review: Augusto Callejas <acallejas@instructure.com>
QA-Review: Augusto Callejas <acallejas@instructure.com>
Tested-by: Jenkins

app/models/outcome_import.rb

@@ -29,12 +29,14 @@ class OutcomeImport < ApplicationRecord
 
   workflow do
     state :initializing
-    state :created
-    state :importing
-    state :imported
-    state :imported_with_messages
-    state :aborted
+    state :created do
+      event :job_started, transitions_to: :importing
+    end
+    state :importing do
+      event :job_completed, transitions_to: :succeeded
+      event :job_failed, transitions_to: :failed
+    end
+    state :succeeded
     state :failed
-    state :failed_with_messages
   end
 end

db/migrate/20180301192608_add_row_to_outcome_import_error.rb

@@ -0,0 +1,25 @@
+#
+# Copyright (C) 2018 - present Instructure, Inc.
+#
+# This file is part of Canvas.
+#
+# Canvas is free software: you can redistribute it and/or modify it under
+# the terms of the GNU Affero General Public License as published by the Free
+# Software Foundation, version 3 of the License.
+#
+# Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
+# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+# A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Affero General Public License along
+# with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+
+class AddRowToOutcomeImportError < ActiveRecord::Migration[5.0]
+  tag :predeploy
+
+  def change
+    add_column :outcome_import_errors, :row, :integer
+  end
+end