Displays supplier info fields on Application Details page

This commit displays the additional information added to the manifest.yaml
file for the package's supplier. This commit depends on:
https://review.openstack.org/#/c/99465/ to be merged first.

Change-Id: I60c5a811b7254f63abf2694595538f93c07e9696
Implements: blueprint additional-author-information
Merge "Displays supplier info fields on Application Details page"