Add a unix socket oslo.messaging notifications driver for local notifications for oslo.messaging

This blueprint tracks the introduction of an oslo messaging notification driver to deliver notifications to another agent on the same host via a UNIX socket. The intent is to remove the need to export notification to the message bus (rabbit) and then subscribe to that bus when the consuming service resides on the s...

introduce support for dynamic hugepage configuration for kolla-ansible

---------------hugepage usecase --------------------------- hugepages aka kernel largepages are a feature of the linux kernel that allow the use of memory pages grater then the default 4k size. By supporting larger page allocation the kernel allows better utilization of the Translation look aside buffer(tlb) by r...