Refactors set_next_execution_timestamp in order to make mirror lower bound...

Refactors set_next_execution_timestamp in order to make mirror lower bound delay to be under effect of the mirror current retry count as well.

app/models/project_mirror_data.rb

@@ -26,8 +26,8 @@ class ProjectMirrorData < ActiveRecord::Base
   def set_next_execution_timestamp!
     timestamp = Time.now
     retry_factor = [1, self.retry_count].max
-    delay = [base_delay(timestamp) * retry_factor, Gitlab::Mirror.max_delay].min
-    delay = [delay, Gitlab::Mirror.min_delay].max
+    delay = [base_delay(timestamp), Gitlab::Mirror.min_delay].max
+    delay = [delay * retry_factor, Gitlab::Mirror.max_delay].min
 
     self.next_execution_timestamp = timestamp + delay
   end

spec/models/project_mirror_data_spec.rb

@@ -104,7 +104,7 @@ describe ProjectMirrorData, type: :model do
 
             expect do
               mirror_data.set_next_execution_timestamp!
-            end.to change { mirror_data.next_execution_timestamp }.to be_within(interval).of(timestamp + 15.minutes)
+            end.to change { mirror_data.next_execution_timestamp }.to be_within(interval).of(timestamp + 45.minutes)
           end
         end
       end