Fix regression with my previous staging attempt

Staging projects have more disabled repositories than I
thought, we forgot about the bootstrap_copy repository,
which led to all staging projects in Factory being 'building'
after my last change was deployed.

Now reverting this in parts and leaving the build_state
unaffected, but forcing all checks of disabled repositories
to 'pending' as such forcing the staging project to 'testing'

src/api/app/models/obs_factory/staging_project.rb

@@ -44,7 +44,6 @@ def self.find(distribution, id)
     # @return [String] description of the Project object
     delegate :description, to: :project
 
-    delegate :checks, to: :project
     delegate :missing_checks, to: :project
 
     # Checks if the project is adi staging project
@@ -207,11 +206,25 @@ def attributes
     end
 
     def build_state
-      return :building if building_repositories.present? || disabled_repositories.present?
+      return :building if building_repositories.present?
       return :failed if broken_packages.present?
       :acceptable
     end
 
+    def checks
+      # for stagings we ignore 'old' checks in disabled repositories
+      repos = disabled_repositories
+      project.checks.each do |check|
+        next unless repos.include?(check.status_report.checkable)
+        # we can't simply ignore them as missing_checks is calculated
+        # independently, so we would be left without missing checks
+        # but without checks - so better mark them as 'old/pending',
+        # but only in memory, not in the database.
+        check.state = :pending
+        check.url = nil
+      end
+    end
+
     def check_state
       if missing_checks.present? || checks.any?(&:pending?)
         :testing