When resizing a NG we should strictly send the
desired node_count and the nodes_to_remove.
Otherwise the stack update operation may replace/rebuild
nodes or other resources.
This was the functionality with:
Id84e5d878b21c908021e631514c2c58b3fe8b8b0
But it was reverted with:
I725413e77f5a7bdb48131e8a10e5dc884b5e066a
Story: 2005266
task: 39860
master Conflicts:
magnum/drivers/heat/k8s_template_def.py
ussuri Conflicts:
magnum/tests/unit/drivers/test_template_definition.py
master (cherry-picked from 9f4c63a0df)
ussuri (cherry-picked from 83ed6fe5d8)
Change-Id: Ib31b6801e0e2d954c31ac91e77ae9d3ef1afebd2
Signed-off-by: Spyros Trigazis <strigazi@gmail.com>