fixes #4989,6734,6735 - adapting sync management page to use dynflow

Note that some columns in the sync management table
have changed to reflect difficulty of fetching some data.
fixes #6128 - Fixes errata icons not showing, BZ 902948
fixes #6663 - Details tab of foreman host shows multiple entries of 'Subscription Status'
Merge pull request #4519 from cfouant/errata

fixes #6128 - Fixes errata icons not showing, BZ 902948
Merge pull request #4471 from jlsherrill/syncing

fixes #4989,6734,6735 - adapting sync management page to use dynflow
Merge pull request #4529 from isratrade/6931

fixes #6663 - Details tab of foreman host shows multiple entries of 'Subscription Status'