Change for citizenship link url on UKVI homepage

Relates to https://www.pivotaltracker.com/story/show/68446230
Add 3 hardcoded links to EA org show page

Relates to https://www.pivotaltracker.com/story/show/68186692
Hardcoded absolute URLs on org show are now paths

To allow for easier testing on preview, the links have now been changed to
paths.
Merge pull request #1396 from alphagov/hardcoded-3-links-for-ea-and-ukvi-change

Hardcoded 3 links for ea and ukvi change

https://www.pivotaltracker.com/story/show/68186692
https://www.pivotaltracker.com/story/show/68446230