Attempt to fix import/export of push_access_levels for protected tags

lib/gitlab/import_export/import_export.yml

@@ -46,6 +46,8 @@ project_tree:
   - protected_branches:
     - :merge_access_levels
     - :push_access_levels
+  - protected_tags:
+    - :push_access_levels
   - :project_feature
 # Only include the following attributes for the models specified.

lib/gitlab/import_export/relation_factory.rb

@@ -7,8 +7,9 @@ module Gitlab
                     triggers: 'Ci::Trigger',
                     builds: 'Ci::Build',
                     hooks: 'ProjectHook',
-                    merge_access_levels: 'ProtectedBranch::MergeAccessLevel', #TODO: Tags
+                    merge_access_levels: 'ProtectedBranch::MergeAccessLevel',
                     push_access_levels: 'ProtectedBranch::PushAccessLevel',
+                    #TODO: How to add?- push_access_levels: 'ProtectedTag::PushAccessLevel',
                     labels: :project_labels,
                     priorities: :label_priorities,
                     label: :project_label }.freeze

spec/lib/gitlab/import_export/all_models.yml

@@ -111,10 +111,14 @@ protected_branches:
 - project
 - merge_access_levels
 - push_access_levels
+protected_tags:
+- project
+- push_access_levels
 merge_access_levels:
 - protected_branch
 push_access_levels:
 - protected_branch
+- protected_tag
 project:
 - taggings
 - base_tags
@@ -169,6 +173,7 @@ project:
 - snippets
 - hooks
 - protected_branches
+- protected_tags
 - project_members
 - users
 - requesters