Figure out a good way (management command, bin script?) to extract and appropriately anonymise data from live for updating other vhosts and local dev

[stevenday]

It would be nice to have something that did approximately:

• extract all orgs/trusts/ccgs, anonymising/changing email addresses
• assign the dev users to the ccgs/trusts appropriately
• generate some dummy problems for the extracted orgs (easier than anonymising them I think, and more suitable anyway since there's not that many in the site)
• extract the existing reviews for the extracted orgs (I don't think any data here needs to be anonymised)
• extract the existing news articles

It would be great to run one command and get one big .json that we could loaddata into another vhost or our local dev box, to keep them useful and up to date with the live site.

[stevenday]

I've added a command in 6a3fd711ef20b77db750bab9185b7146d1c8c2d4 to dump data out - it can't assign the dev users easily because they're not in the database you'll be dumping from, so this is something better done on/after importing the data from this command I think. I'll add a companion command to do that too.

Since we already have a command to generate problems, on second thoughts I'll leave that out of this.