use org.junit.Assert instead of deprecated junit.framework.Assert

Author: innokenty

proxy/src/test/java/ru/qatools/gridrouter/json/WithOpenSessionsTest.java

@@ -6,7 +6,7 @@
 import java.util.concurrent.Executors;
 
 import static java.util.concurrent.TimeUnit.SECONDS;
-import static junit.framework.Assert.assertTrue;
+import static org.junit.Assert.assertTrue;
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.Matchers.is;