Enable LTI2 placement for Assignment Configuration

Fixes: PLAT-1964

Test Plan:
- Install the LTI 2 test tool in a course
- During registration select the "Assignment Configuration"
  placement.
- Create a new assignment with submission type online
  with file uploads.
- Verify the LTI 2 test tool appears in the list of
  Plagiarism Review tools.
- Select the tool from this list and verify it launches

Change-Id: Ibebe916fb7209c1fe61608610bb85f541e43bccf
Reviewed-on: https://gerrit.instructure.com/95392
Tested-by: Jenkins
Reviewed-by: Nathan Mills <nathanm@instructure.com>
QA-Review: August Thornton <august@instructure.com>
Product-Review: Weston Dransfield <wdransfield@instructure.com>

app/models/lti/tool_consumer_profile_creator.rb

@@ -17,6 +17,7 @@ module Lti
           Canvas.placements.assignmentSelection
           Canvas.placements.linkSelection
           Canvas.placements.postGrades
+          Canvas.placements.assignmentConfiguration
           User.username
           Person.email.primary
           Person.name.given

spec/models/lti/tool_consumer_profile_creator_spec.rb

@@ -96,6 +96,11 @@ module Lti
           expect(subject.create.capability_offered).to include 'Canvas.placements.courseNavigation'
         end
 
+        it 'adds the Canvas.placements.assignmentConfiguration capability' do
+          expect(subject.create.capability_offered).to include 'Canvas.placements.assignmentConfiguration'
+        end
+
+
         it 'adds the ToolConsumerProfile.url capability' do
           expect(subject.create.capability_offered).to include 'ToolConsumerProfile.url'
         end