[MM-13033] Continue bulk import on large image error (#10780)

* [MM-13033] Continue bulk import on large image error

* add tests, review comments

* Update app/import_functions.go

Co-Authored-By: liusy182 <liusy182@hotmail.com>

app/import_test.go

@@ -4,6 +4,7 @@
 package app
 
 import (
+	"net/http"
 	"path/filepath"
 	"runtime/debug"
 	"strings"
@@ -159,6 +160,23 @@ func TestImportImportLine(t *testing.T) {
 	}
 }
 
+func TestStopOnError(t *testing.T) {
+	assert.True(t, stopOnError(LineImportWorkerError{
+		model.NewAppError("test", "app.import.attachment.bad_file.error", nil, "", http.StatusBadRequest),
+		1,
+	}))
+
+	assert.True(t, stopOnError(LineImportWorkerError{
+		model.NewAppError("test", "app.import.attachment.file_upload.error", nil, "", http.StatusBadRequest),
+		1,
+	}))
+
+	assert.False(t, stopOnError(LineImportWorkerError{
+		model.NewAppError("test", "api.file.upload_file.large_image.app_error", nil, "", http.StatusBadRequest),
+		1,
+	}))
+}
+
 func TestImportBulkImport(t *testing.T) {
 	th := Setup(t)
 	defer th.TearDown()