[devel] Convert scripts to new entrypoint compatible style
This PR looks scary but it's "simply":
- !909 (merged) (will rebase once that is merged)
- Rename all scripts to have
_
in their filenames - Indent all scripts to make them compatible with the new entrypoint style for Python 3
The docs are broken as they're trying to build against DIRAC v7r1 still. They will be fixed in my next PR (already commited and tested, I just want to separate the non-trivial changes from this unreview-able mess).
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*Python 3 CHANGE: Convert scripts to new entrypoint compatible style
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