[#6007] Add helpful text and a list of projects to the default nbhd wikis
[#6007] Give full names to the default projects
[#6007] Better installation of subproject in bootstrap.  Don't leave a c.user/project

Default subproject is now named, not first tool in test project,
and with a wiki instead of no tools.

This also stops leaving a c.user and c.project around.  So many tests
are updated to explicitly set up a c.user or c.project if they were
relying on that.
[#6007] fix more test failures