Rewrite revisions unit tests to account for [23842].

wp_insert_post() (and thus the factory) does *not* create a revision by default. When it is desired for the first "save" to be a revision, an auto-draft should be used.

The various cap-checking tests still use wp_insert_post() to test that route as well, hence the decrementing of revision counts.

see #24708.



git-svn-id: https://unit-tests.svn.wordpress.org/trunk@1309 4a5a2adb-35eb-4268-9a1b-fe04a4134342