Modernize exception handling for devteam tools

[davebx]

Also gets rid of tool_dependencies.xml for those tools.

[bgruening]

The tests have not been running here :(

[davebx]

@bgruening not surprising, I just checked, and all of them are in .tt_skip

[bgruening]

I'm a little bit hesitant to merge this without tests, but if we enable tests we probably get a lot of linting and testing issues.

[davebx]

It might be interesting to see how many errors we get? I know that anything depending on package_taxonomy will fail, because the bitbucket URL to download that tarball is now 404.

[davebx]

This needs some more work before it can be merged.

[bgruening]

@davebx are you working on that still?