Add p tags to text nodes, so that they get rendered by vsl-templates.
Add p tags to text nodes, so that they get rendered by vsl-templates.

git-svn-id: https://svn.apache.org/repos/asf/jmeter/trunk@1768731 13f79535-47bb-0310-9956-ffa450edef68

Former-commit-id: 4b8c67a78f26667f9225c77787aac13a151872cb
apache/jmeter,benbenw/jmeter,benbenw/jmeter,apache/jmeter,ham1/jmeter,apache/jmeter,etnetera/jmeter,ham1/jmeter,ham1/jmeter,ham1/jmeter,etnetera/jmeter,etnetera/jmeter,etnetera/jmeter,benbenw/jmeter,etnetera/jmeter,apache/jmeter,benbenw/jmeter,apache/jmeter,ham1/jmeter