Ensure migrations are run in order.
Ensure migrations are run in order.

Changed the migrations_* dictionaries to be ordered so there is more
control over the ordering of model changes.

ckan/ckanext-archiver,datagovuk/ckanext-archiver,DanePubliczneGovPl/ckanext-archiver,ckan/ckanext-archiver,DanePubliczneGovPl/ckanext-archiver,DanePubliczneGovPl/ckanext-archiver,datagovuk/ckanext-archiver,ckan/ckanext-archiver,datagovuk/ckanext-archiver