[meta-virtualization] [m-c-s][PATCH] python-*: switch remaining (https) pypi recipes to use the pypi class

The original commit to switch pypi recipes to use the pypi.bbclass only addressed the urgent need to get the recipes using "http" converted. This change is the same but converts the remaining pypi recipes which were already uing "https". Cleanup the various python-* recipes which download from

[meta-virtualization] [RFC] xen: Enable compilation with external source

When building Xen from an external source the compile step fails as there is no Makefile (or anything else) copied into the Yocto build directories. Signed-off-by: Alistair Francis --- This seems really nasty, but it's the only way I can get external source build