Cherry-picked the following commits from the master branch.
No functional changes are included.
* 06b58b9e Increase timeout value of heat stack creation
* 0d412ba7 Add new FT set for tests with separated NFVO
* ba813054 Split FT to Legacy and SOL implementation
* 578b12e9 Add a seperate controller subnode to subdivide the memory load
Change-Id: I94c692a0a0576fbffdd7781994e99c476bb145df