Fix misspellings in tempest

Fix misspellings detected by:
* pip install misspellings
* git ls-files | grep -v locale | misspellings -f -

Change-Id: Ib92aabf48a18a32aa7384f7ad4b7337be78edc34
Closes-Bug: #1257295
Fix author information

I have checked the author of other projects. Most of them are just
'OpenStack'. And OpenStack QA is not suitable for the author because
many development members contribute to Tempest. And author-email is not
proper email address recently. It is deprecated now.

Change-Id: I0f7405d107bf40d4781acb0e4b4a5db20d7606e4
Merge "Fix misspellings in tempest"
Merge "Fix author information"