fix MRs, added project restorer spec

app/models/merge_request.rb

@@ -99,7 +99,7 @@ class MergeRequest < ActiveRecord::Base
   validates :merge_user, presence: true, if: :merge_when_pipeline_succeeds?, unless: :importing?
   validate :validate_branches, unless: [:allow_broken, :importing?, :closed_without_fork?]
   validate :validate_fork, unless: :closed_without_fork?
-  validate :validate_approvals_before_merge
+  validate :validate_approvals_before_merge, unless: :importing?
   validate :validate_target_project, on: :create
 
   scope :by_source_or_target_branch, ->(branch_name) do

ee/app/models/ee/project.rb

@@ -8,7 +8,6 @@ module EE
 
     prepended do
       include Elastic::ProjectsSearch
-      include Importable
       prepend GeoAwareAvatar
       prepend ImportStatusStateMachine
 
@@ -54,7 +53,7 @@ module EE
       validates :repository_size_limit,
         numericality: { only_integer: true, greater_than_or_equal_to: 0, allow_nil: true }
 
-      validates :approvals_before_merge, numericality: true, allow_blank: true, unless: :importing?
+      validates :approvals_before_merge, numericality: true, allow_blank: true
 
       accepts_nested_attributes_for :remote_mirrors,
         allow_destroy: true,

spec/lib/gitlab/import_export/project.json

@@ -2967,7 +2967,8 @@
           "action": 1,
           "author_id": 1
         }
-      ]
+      ],
+      "approvals_before_merge": 1
     },
     {
       "id": 26,