Comment 7 for bug 1225395

Wouldn't it make more sense to not bother with the verification, rather add these as general pre-requisites before installation starts.
It seems python-dev is already added as a pre-requisite and gets duly installed.
In my case, libxml2-dev and libxslt1-dev also got installed, but I wan't using my bo solely for devstack so it might have got installed due to some other dependency.
I have sent a patch with this fix for reivew :
https://review.openstack.org/171109