Fix missing organisation metadata

Example - https://www.gov.uk/government/ministers/foreign-secretary

• added code to include org meatadata
• wrapped in if statement to not show if a minister has no org

https://www.pivotaltracker.com/story/show/75507696

Reverting show to use the org name list partial and updating so that
it uses organisations instead of lead_organisations

This is after discussion with Tekin
Removing unused lead_organisations and show_hm_government from org
name list partial and updating topics and topical events show pages

Again this follows a discussion with Tekin

Remove unecessary if statement
Merge pull request #1633 from alphagov/fix-broken-minister-metadata

Fix missing organisation metadata