doxygen: python3 fixes
doxygen: python3 fixes

Change-Id: I0ee41f0f36ce320e3115455997e11e2adf409ae2
(cherry picked from commit 26fed77e9f0fd04a17bc257b92c5dae9c24ee140)

intelxed/mbuild,intelxed/mbuild,intelxed/mbuild