Add ordered redis data structure to store system log
Add ordered redis data structure to store system log

- keeps order in which items are inserted
- allow to update certain item by uid
- provides FIFO interface for collection

loles/solar,torgartor21/solar,loles/solar,loles/solar,torgartor21/solar,zen/solar,zen/solar,Mirantis/solar,Mirantis/solar,CGenie/solar,pigmej/solar,zen/solar,openstack/solar,Mirantis/solar,Mirantis/solar,loles/solar,pigmej/solar,openstack/solar,dshulyak/solar,CGenie/solar,zen/solar,openstack/solar,dshulyak/solar,pigmej/solar