qa_crowbarsetup: fix name of nodescompute var
qa_crowbarsetup: fix name of nodescompute var

this is a fixup for
f9938fbf5cb4d0a2a56590e5ee127727947c0a27
c008a31fa897511057e4a3991db4dbc2a6f77253

even though the variable is currently only used in the hacloud=1 case
we want it to always contain correct values

SUSE-Cloud/automation,SUSE-Cloud/automation,gosipyan/automation,aspiers/automation,aspiers/automation,gosipyan/automation,gosipyan/automation,gosipyan/automation,SUSE-Cloud/automation,aspiers/automation,vmoravec/automation,SUSE-Cloud/automation,vmoravec/automation,vmoravec/automation,aspiers/automation,vmoravec/automation