bisector: various cleanups
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Python 3.4 is not supported by LISA and is not really relevant anymore, since Ubuntu Xenial 16.04 LTS ships with 3.5.
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small refactoring of YAML management, to make it similar to how it is done in lisa.utils
Python 3.4 is not supported by LISA and is not really relevant anymore, since Ubuntu Xenial 16.04 LTS ships with 3.5.
small refactoring of YAML management, to make it similar to how it is done in lisa.utils