Add CaaS networks related validations

Add CaaS networks related validations

- Add CaaS cluster and tenant network related validations

- Modified baremetal deployment Architecture, so that nodes and their Datastructures are not created in playbook. They are now coming from Inventory, generated using CM Inventory handler. This way we don't have to iterate through nodes list. One thread per node is forked, but all are executed on installation controller using delegate_to ansible keyword. This saves baremetal provisioning time, and improves code readability

- Add REC specific REC userconfighandler for network profiles

Change-Id: I299fea47177a2ad1a24e0715e9f2d5f37c3d2e08
Signed-off-by: Krisztian Lengyel <krisztian.lengyel@nokia.com>