Extract namespaces from report.Namespace
Extract namespaces from report.Namespace

This avoids unnecessary loops.

weaveworks/scope,alban/scope,kinvolk/scope,kinvolk/scope,kinvolk/scope,alban/scope,kinvolk/scope,weaveworks/scope,weaveworks/scope,alban/scope,alban/scope,kinvolk/scope,weaveworks/scope,kinvolk/scope,weaveworks/scope,weaveworks/scope,alban/scope,alban/scope