Update documentation and test decks to use shorthand for tests.
(cherry picked from commit 86a7df4cef32f68e145e24ef815fe9793f88c9ae)
Add support for specifying nettests via their shorthand name.
(cherry picked from commit cd8084ecdd5742bda39fc3294522464ddef852f0)
Move all nettests from data/ directory to the ooni/nettests directory.
(cherry picked from commit 30ad9e2abde45ed3946d7b00cf1e7939f7db1cfd)