Add user migration script

Author: cycomachead

script/migrate_lti_ids.rb

@@ -0,0 +1,13 @@
+# Set LTI user ids based on Student's full names
+Submission.find_each do |subm|
+  name = subm.user_info['full_name']
+  next unless name
+  lti_user = DceLti::User.where(lis_person_name_full: name)
+  if lti_user.count != 1
+    puts "Found #{lti_user.count} users for #{name}"
+    next
+  end
+  lti_user = lti_user.first
+  subm.dce_lti_user_id = lti_user.id
+  subm.save!
+end