Move testing info higher in contrib docs
This moves the Testing section to be second in the TOC after
setting up the development environment so the high level info
people need is up front before the information that digs into
more specific details.
@@ -29,10 +29,10 @@ Programming HowTos and Tutorials
:maxdepth: 3
development.environment
+ testing
api_microversion_dev
api_conditional_updates
api_microversion_history
- testing
addmethod.openstackapi
drivers
gmr
