Resolve migration helper conflicts

From `master`

lib/gitlab/database/migration_helpers.rb

@@ -278,8 +278,6 @@ module Gitlab
           raise 'rename_column_concurrently can not be run inside a transaction'
         end
-<<<<<<< HEAD
-=======
         old_col = column_for(table, old)
         new_type = type || old_col.type
@@ -293,7 +291,6 @@ module Gitlab
         # necessary since we copy over old values further down.
         change_column_default(table, new, old_col.default) if old_col.default
->>>>>>> c53d06c4d8... Merge branch 'dm-rename-column-concurrently-with-null' into 'master'
         trigger_name = rename_trigger_name(table, old, new)
         quoted_table = quote_table_name(table)
         quoted_old = quote_column_name(old)
@@ -307,16 +304,6 @@ module Gitlab
                                             quoted_old, quoted_new)
         end
-        old_col = column_for(table, old)
-        new_type = type || old_col.type
-
-        add_column(table, new, new_type,
-                   limit: old_col.limit,
-                   default: old_col.default,
-                   null: old_col.null,
-                   precision: old_col.precision,
-                   scale: old_col.scale)
-
         update_column_in_batches(table, new, Arel::Table.new(table)[old])
         change_column_null(table, new, false) unless old_col.null

spec/lib/gitlab/database/migration_helpers_spec.rb

@@ -382,14 +382,12 @@ describe Gitlab::Database::MigrationHelpers, lib: true do
           expect(model).to receive(:add_column).
             with(:users, :new, :integer,
                  limit: old_column.limit,
-<<<<<<< HEAD
-                 default: old_column.default,
-                 null: old_column.null,
-=======
->>>>>>> c53d06c4d8... Merge branch 'dm-rename-column-concurrently-with-null' into 'master'
                  precision: old_column.precision,
                  scale: old_column.scale)
+          expect(model).to receive(:change_column_default).
+            with(:users, :new, old_column.default)
+
           expect(model).to receive(:update_column_in_batches)
           expect(model).to receive(:change_column_null).with(:users, :new, false)
@@ -411,14 +409,12 @@ describe Gitlab::Database::MigrationHelpers, lib: true do
           expect(model).to receive(:add_column).
             with(:users, :new, :integer,
                  limit: old_column.limit,
-<<<<<<< HEAD
-                 default: old_column.default,
-                 null: old_column.null,
-=======
->>>>>>> c53d06c4d8... Merge branch 'dm-rename-column-concurrently-with-null' into 'master'
                  precision: old_column.precision,
                  scale: old_column.scale)
+          expect(model).to receive(:change_column_default).
+            with(:users, :new, old_column.default)
+
           expect(model).to receive(:update_column_in_batches)
           expect(model).to receive(:change_column_null).with(:users, :new, false)