(VDB-371) Recheck queued storage

- Iterate through queued storage at defined interval, popping rows
  from the queue if successfully persisted

libraries/shared/mocks/storage_fetcher.go

@@ -12,12 +12,12 @@ func NewMockStorageFetcher() *MockStorageFetcher {
 }
 
 func (fetcher *MockStorageFetcher) FetchStorageDiffs(out chan<- utils.StorageDiffRow, errs chan<- error) {
+	defer close(out)
+	defer close(errs)
 	for _, err := range fetcher.ErrsToReturn {
 		errs <- err
 	}
 	for _, row := range fetcher.RowsToReturn {
 		out <- row
 	}
-	close(out)
-	close(errs)
 }

libraries/shared/mocks/storage_queue.go

@@ -21,21 +21,26 @@ import (
 )
 
 type MockStorageQueue struct {
-	AddCalled bool
-	AddError  error
-	PassedRow utils.StorageDiffRow
+	AddCalled      bool
+	AddError       error
+	AddPassedRow   utils.StorageDiffRow
+	DeleteErr      error
+	DeletePassedId int
+	GetAllErr      error
+	RowsToReturn   []utils.StorageDiffRow
 }
 
 func (queue *MockStorageQueue) Add(row utils.StorageDiffRow) error {
 	queue.AddCalled = true
-	queue.PassedRow = row
+	queue.AddPassedRow = row
 	return queue.AddError
 }
 
 func (queue *MockStorageQueue) Delete(id int) error {
-	panic("implement me")
+	queue.DeletePassedId = id
+	return queue.DeleteErr
 }
 
 func (queue *MockStorageQueue) GetAll() ([]utils.StorageDiffRow, error) {
-	panic("implement me")
+	return queue.RowsToReturn, queue.GetAllErr
 }