Fixes #5008 Manifest History not updated on import

- importing/deleting/reloading manifest file also triggers update/display of manifest
  history
- BZ1077893
- exposes import history in subscriptions v2 api
Merge pull request #4020 from dustint-rh/bz1077893_redmine_5008_fix_display_of_manifest_history_and_in_v2_subs_orgs3

Fixes #5008 Manifest History not updated on import