Copy ^/projects/fuse2 to ^/projects/fuse2-googletest-engine

The purpose of this branch is to overlay the changes I'm proposing as part of
^/projects/kyua-use-googletest-test-interface with the work that asomers is
doing, with the intent of making sure that the tests continue to function
when the Google Test support is added to Kyua (see
https://github.com/jmmv/kyua/pull/203 for more details).