Fix update of node_count field for containerinfra_cluster_v1 resource and {min,max}_node_count fields for containerinfra_nodegroup_v1 resource

[pawcykca]

Close #1102

This PR should allow users to update node_count of cluster resource.

[MrFreezeex]

Hmm on our OpenStack cluster changing the number of nodes was working fine (IIRC our magnum is running train version). Maybe magnum changed something in the API...

[MrFreezeex]

I am guessing that if this is the right fix, it would also applies to {min,max}_node_count on the nodegroup resource as well.

[pawcykca]

Hmm on our OpenStack cluster changing the number of nodes was working fine (IIRC our magnum is running train version). Maybe magnum changed something in the API...

I'm testing this feature on Openstack Ussuri.

Based on official API reference, samples and source code (for both Train and Ussuri releases) the value of node_count parameter should be int, not string: https://github.com/openstack/magnum/blob/stable/ussuri/api-ref/source/clusters.inc#update-information-of-cluster https://github.com/openstack/magnum/blob/stable/ussuri/magnum/api/controllers/v1/cluster.py#L106

[pawcykca]

I am guessing that if this is the right fix, it would also applies to {min,max}_node_count on the nodegroup resource as well.

That's true. I have also fixed this resource in case of {min,max}_node_count update. In addition I also fixed max_node_count deletion.

[nikParasyr]

@ozerovandrei Can you have a look into this as well? Unfortunately i have not gotten the ci to work magnum yet. From my side and with the provided links, this looks ok, but i dont have any environment to actually test it