Port pipe_tasks to Python 3
Port ip_diffim to Python 3
Port afw to Python 3
Port meas_algorithms to python 3
Modify meas_deblender tests to support pytest
Support Python 3 migration
Passes all python 2 and 3 tests in Jenkins.
The commit history is a little strange and will be cleaned up before merging. Hsin Fang updated the module for lsst.log and I didn't rebase correctly the first time.
Looks good. Please squash commits and squash them into the correct relevant commit (so the bad merge commit goes with the autopep8 commit).
Sorry. I didn't reload the ticket before I filed my comment.
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