Support provisioning of all VMs and support LB
Add LB to create_all.yml
Merge nova_compute task with and without FIP
Support number of instances to be launched
Update path of files and templates
Add install_lbs to install_all
Add README
Remove lbs_count

web_count/lbs_count = 0 does not work for with_sequence.
At now *_count=0 is not supported.