Fixup the wpcom.me().postsList() test
Fixup the wpcom.me().postsList() test

Don't check for the `meta` field. It's present only if the posts list has multiple pages
of results. Then there is a `meta.next_page` field with URL of the next page. For a testing
account with a small number of posts, the `meta` field is not present and the test fails.

Automattic/wpcom.js,Automattic/wpcom.js