Clarify Use Namespaces also for XPath Extractor
Clarify Use Namespaces also for XPath Extractor

git-svn-id: https://svn.apache.org/repos/asf/jmeter/trunk@1764045 13f79535-47bb-0310-9956-ffa450edef68

Former-commit-id: 0efa8ce8e0de937892ae38c8c78a90f62a7f81c1
etnetera/jmeter,apache/jmeter,benbenw/jmeter,etnetera/jmeter,ham1/jmeter,benbenw/jmeter,etnetera/jmeter,apache/jmeter,ham1/jmeter,ham1/jmeter,apache/jmeter,ham1/jmeter,etnetera/jmeter,apache/jmeter,etnetera/jmeter,benbenw/jmeter,apache/jmeter,ham1/jmeter,benbenw/jmeter