Update web-platform-tests expected data

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rename : testing/web-platform/meta/IndexedDB/idbobjectstore_deleted.htm.ini => testing/web-platform/meta/IndexedDB/idbcursor_delete_index4.htm.ini
rename : testing/web-platform/meta/IndexedDB/idbobjectstore_deleted.htm.ini => testing/web-platform/meta/IndexedDB/idbcursor_delete_objectstore4.htm.ini
rename : testing/web-platform/meta/IndexedDB/idbobjectstore_deleted.htm.ini => testing/web-platform/meta/IndexedDB/idbcursor_update_index4.htm.ini
rename : testing/web-platform/meta/IndexedDB/idbobjectstore_deleted.htm.ini => testing/web-platform/meta/IndexedDB/idbcursor_update_objectstore5.htm.ini
rename : testing/web-platform/meta/IndexedDB/idbobjectstore_deleted.htm.ini => testing/web-platform/meta/IndexedDB/idbindex_get6.htm.ini
rename : testing/web-platform/meta/IndexedDB/idbobjectstore_deleted.htm.ini => testing/web-platform/meta/IndexedDB/idbindex_openCursor.htm.ini
rename : testing/web-platform/meta/IndexedDB/idbobjectstore_deleted.htm.ini => testing/web-platform/meta/IndexedDB/idbindex_openKeyCursor2.htm.ini