Build project independent "test-usermanual.pdf" (with all common
chapters automatically included) and "test-vty-reference.pdf" files.
This allows testing if changed common chapters and the build scripts
are still working, even when the project specific manuals will be moved
away from this repository.
(moving manuals to project repositories 2/19)
Related: OS#3386
Change-Id: Ia74e32678c95e22ba493e80d0a4a8f783c5a5ddf