Fix tempest doc typos

One sentence was worded better to avoid "with" at the end of the sentence
but kept it a good doc formatted sentence.

There was a wrong word "a" that should have been "are" in one sentence.

Closes-Bug: #2144311
Change-Id: I970629344d824050bc6071a853da04b47aa6819a
Signed-off-by: Jason Paroly <jparoly@redhat.com>
1 file changed