There are two fixes included in this patch:
1. List nodes correctly. We have renamed minion to node, which
cause the filter doesn't work correctly.
2. The response from magnumclient resize method is not a json,
so we need to convert it to dict before return. Rolling upgrade
has the same issue.
Task: 39810
Story: 2007697
Change-Id: I7a03dfea2c84a423f15cfbe4194a8492f72dbd35
96312eaf09