Switch to python 3.5

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

lib/apache

@@ -71,7 +71,15 @@ function install_apache_wsgi {
     # Apache installation, because we mark it NOPRIME
     if is_ubuntu; then
         # Install apache2, which is NOPRIME'd
-        install_package apache2 libapache2-mod-wsgi
+        install_package apache2
+        if python3_enabled; then
+            if is_package_installed libapache2-mod-wsgi; then
+                uninstall_package libapache2-mod-wsgi
+            fi
+            install_package libapache2-mod-wsgi-py3
+        else
+            install_package libapache2-mod-wsgi
+        fi
     elif is_fedora; then
         sudo rm -f /etc/httpd/conf.d/000-*
         install_package httpd mod_wsgi