fill_in_blueprints now takes a defaulting_map_t to specify distribution priority on a per-namespace basis.
Make use of the per-namespace distribution priority in the admin CLI.
Prepared to also make use of it in the semilattice_app (HTTP interface).
Extract the affected name spaces in the semilattice app.
Fix to previous commit: namespace ID now extracted from HTTP resource.
Small refactoring: Moved helper function into semilattice_http_app_t class
Missing 'explicit' for constructor
Simplified selective distribution priority for meta operations.
Minimal refactoring.
Merge branch 'daniel_1751' into next