run: Add --bootstrap option

Consolidate the get_started.py scripts in ./run. There's
no real need of having such scripts inside each sub
directory, they're still here for historical reasons.

So now, executing

./run -t qemu --bootstrap

Has the exact same effect as

qemu/get_started.py

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
run: Add --update-config

Replace the script update_config.py with the option
--update-config to the runner script. It will simply
update all config files, overriding any manual configs
and/or files that had upstream changes.

The reason we don't do it compulsorily is because we
find it is rude to just override other people's
customizations, and there's no obvious way to tell
when it's simply an upstream update or someone that
edited one particular file.

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
Remove all get_started.py scripts

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
Remove all update_config.py scripts

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
Remove all common.py scripts

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>