Use trueorfalse to normalize the values for USE_PYTHON3
Install 3.5 instead of 3.4 When USE_PYTHON3 is specified.
Also, since not many packages are classified correctly, fallback
to looking for just "Programming Language :: Python :: 3" and
log a message for the package to highlight the problem.
Also special case some services that are *almost* ready
Depends-On: Id48e1b328230fcdf97ed1cb4b97f4c3f9cf6eb8a
Depends-On: Ib7d9aa0e0b74a936002e0eea0b3af05102b06a62
Change-Id: I243ea4b76f0d5ef57a03b5b0798a05468ee6de9b