Update problem-builder requirement to 2.6.5patch2 to migrate keys.

[jcdyer]

@feanil @fredsmith @bradenmacdonald

This pulls in open-craft/problem-builder#160, which provides a new script to run the key migration.

[openedx-webhooks]

Thanks for the pull request, @jcdyer! It looks like you're a member of a company that does contract work for edX. If you're doing this work as part of a paid contract with edX, you should talk to edX about who will review this pull request. If this work is not part of a paid contract with edX, then you should ensure that there is an OSPR issue to track this work in JIRA, so that we don't lose track of your pull request.

Create an OSPR issue for this pull request.

[jcdyer]

Just to make sure the steps forward on this are clear:

• This needs a second review from an edx employee. @fredsmith Can you do that?
• I no longer have merge permissions on edx-platform, so once it gets the second thumb, can @feanil merge it?
• The script should probably get a test run on stage. (@feanil) I'll be available for trouble shooting if needed.
• Finally, it will need to be run on production (@feanil).

I can edit the above if there are more appropriate people to take on the particular tasks.

[feanil]

Just noticed @fredsmith was not tagged as a reviewer on this PR. Just tagged him, that should put this on his radar to review.

[jcdyer]

Thanks. I didn't realize you were using that functionality now.

[feanil]

Test run on stage running now.

[jcdyer]

@feanil Was the test successful?

[feanil]

Test in stage was successful. This was deployed to production today. If I get some time this afternoon, I'll try to kick off the production migration before the weekend otherwise we'll kick it off next week.

[feanil]

I've started the migration in production. At the current rate, it looks like it should finish in under an hour.

@jcdyer Once it's done, I think what we'll need, is to make a PR that removes the old column from the model but don't add the migration. Followed by the addition of the migration that will remove the old column. Sound right?

[feanil]

@jcdyer Migration complete in production.

mysql> select * from problem_builder_answer where course_key is NULL limit 1;
Empty set (0.01 sec)

[jcdyer]

That sounds right.

[bradenmacdonald]

\o/ Thanks @feanil and @jcdyer !