Update parameters for creating DW clusters

[wmudge]

cloudera.cloud/plugins/modules/dw_cluster.py

Line 371 in a233a3b

self.name = self.cdpy.dw.create_cluster(

Should mimic the "configure the payload" approach that we have in cloudera.cloud.env:

cloudera.cloud/plugins/modules/env.py

Line 879 in a233a3b

def _configure_payload(self):

While correct for sure, this other approach is easier for the developer to understand what is getting set.