Set compiler source/target to 1.4
Set compiler source/target to 1.4

git-svn-id: https://svn.apache.org/repos/asf/jakarta/jmeter/branches/rel-2-2@564933 13f79535-47bb-0310-9956-ffa450edef68

Former-commit-id: 6a0580e0fe24426f2d6fe2fdf15e409478a617fd
etnetera/jmeter,apache/jmeter,apache/jmeter,ham1/jmeter,benbenw/jmeter,ham1/jmeter,etnetera/jmeter,etnetera/jmeter,benbenw/jmeter,ham1/jmeter,benbenw/jmeter,apache/jmeter,apache/jmeter,etnetera/jmeter,benbenw/jmeter,etnetera/jmeter,apache/jmeter,ham1/jmeter,ham1/jmeter