Rename oslo.sphinx to oslosphinx

oslo.sphinx has been renamed to oslosphinx.

This patch does not touch tools/atc/email-stats.sh
since it will be removed soon.

Closes-Bug: #1277168
Change-Id: Ib446323e26e4a66cb045f7de9b6269cc137eb61f
Merge "Rename oslo.sphinx to oslosphinx"