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Python 2 ceased being maintained on the 1st January 2020.  All users of
Python 2 in oe-core have already been ported to Python 3, so in oe-core
390f3eda Python 2 was finally removed from oe-core itself.

The following are added to meta-python2 in this commit:
- python and python-native 2.7.17
- python-setuptools
- The classes pythonnative, pythondir, distutils, setuptools
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Tim Orling <ticotimo@gmail.com>