Fix imports in JvmErgonomicsTests.java

Author: jasontedor

distribution/tools/launchers/src/test/java/org/elasticsearch/tools/launchers/JvmErgonomicsTests.java

@@ -19,7 +19,7 @@
 
 package org.elasticsearch.tools.launchers;
 
-import org.junit.Before;
+import org.elasticsearch.tools.java_version_checker.JavaVersion;
 
 import java.io.IOException;
 import java.util.Arrays;