Fix a regression in master to set the required kernel
Fix a regression in master to set the required kernel

In the Juno branch the required kernel is set in user_variables.yml
to match the running kernel if the vxlan module is loadable. This
functionality was never added into the master branch and this commit
adds that functionalty back into the AIO stack.

Change-Id: Ie3b72964a32ed3cfe6ff616d6c1fa935ddfad18b
Closes-Bug: #1424921

cloudnull/os-ansible-deployment,stevelle/openstack-ansible,BjoernT/os-ansible-deployment,yanyao/openstack-deployment,sigmavirus24/os-ansible-deployment,BjoernT/os-ansible-deployment,yanyao/openstack-deployment,sti-jans/openstack-ansible,BjoernT/openstack-ansible,weezer/openstack-ansible,d34dh0r53/os-ansible-deployment,sacharya/os-ansible-deployment,major/os-ansible-deployment,jpmontez/os-ansible-deployment,yanyao/openstack-deployment,stevelle/os-ansible-deployment,dhanunjaya/os-ansible-deployment,shane-c/openstack-ansible,major/openstack-ansible,sigmavirus24/openstack-ansible,pombredanne/os-ansible-deployment,cloudnull/os-ansible-deployment,openstack/openstack-ansible,stevelle/openstack-ansible,manuelfelipe/openstack-ansible,Logan2211/openstack-ansible,mrda/openstack-ansible,shane-c/openstack-ansible,yanyao/openstack-deployment,cfarquhar/openstack-ansible,os-cloud/os-ansible-deployment,metral/os-ansible-deployment,yanyao/openstack-deployment-liberty,yanyao/openstack-deployment-liberty,yanyao/newton,os-cloud/os-ansible-deployment,shane-c/openstack-ansible,major/os-ansible-deployment,sacharya/os-ansible-deployment,weezer/openstack-ansible,achekunov/openstack-ansible,yanyao/openstack-deployment-liberty,yanyao/openstack-ansible,sti-jans/openstack-ansible,mrda/openstack-ansible,stackforge/os-ansible-deployment,VaneCloud/openstack-ansible,git-harry/os-ansible-deployment,dhanunjaya/os-ansible-deployment,achekunov/openstack-ansible,open-switch/infra_openstack-ansible,open-switch/infra_openstack-ansible,jpmontez/openstack-ansible,robb-romans/openstack-ansible,cfarquhar/openstack-ansible,yanyao/newton,openstack/openstack-ansible,robb-romans/openstack-ansible,manuelfelipe/openstack-ansible,jpmontez/os-ansible-deployment,miguelgrinberg/os-ansible-deployment,bunchc/openstack-ansible,AlphaStaxLLC/os-ansible-deployment,sti-jans/openstack-ansible,stevelle/os-ansible-deployment,bunchc/openstack-ansible,stackforge/os-ansible-deployment,open-switch/infra_openstack-ansible,jpmontez/os-ansible-deployment,manuelfelipe/openstack-ansible,pombredanne/os-ansible-deployment,git-harry/os-ansible-deployment,achekunov/openstack-ansible,mancdaz/openstack-ansible,mrda/openstack-ansible,sigmavirus24/os-ansible-deployment,yanyao/openstack-ansible,mancdaz/openstack-ansible,miguelgrinberg/os-ansible-deployment,wenhuizhang/os-ansible-deployment,VaneCloud/openstack-ansible,metral/os-ansible-deployment,AlphaStaxLLC/os-ansible-deployment,wenhuizhang/os-ansible-deployment,BjoernT/openstack-ansible,pombredanne/os-ansible-deployment,BjoernT/os-ansible-deployment,jpmontez/openstack-ansible,antonym/openstack-ansible,sigmavirus24/openstack-ansible,Logan2211/openstack-ansible,major/openstack-ansible,VaneCloud/openstack-ansible,antonym/openstack-ansible,d34dh0r53/os-ansible-deployment,antonym/openstack-ansible,jpmontez/openstack-ansible,AlphaStaxLLC/os-ansible-deployment,git-harry/os-ansible-deployment