Add pr template
Add pr template

git-svn-id: https://svn.apache.org/repos/asf/jmeter/trunk@1814575 13f79535-47bb-0310-9956-ffa450edef68

Former-commit-id: f06612b0597802a557f98af4cc0b960dfa2d0bf8
ham1/jmeter,benbenw/jmeter,apache/jmeter,etnetera/jmeter,etnetera/jmeter,apache/jmeter,etnetera/jmeter,benbenw/jmeter,ham1/jmeter,apache/jmeter,apache/jmeter,ham1/jmeter,etnetera/jmeter,etnetera/jmeter,benbenw/jmeter,ham1/jmeter,benbenw/jmeter,apache/jmeter,ham1/jmeter