SK-2440: update imports to use junit 4

Author: saileshwar-skyflow

v3/src/test/java/com/skyflow/utils/UtilsTests.java

@@ -18,7 +18,7 @@
 
 import java.util.*;
 
-import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.Assert.assertEquals;
 
 public class UtilsTests {
     private static final String INVALID_EXCEPTION_THROWN = "Should not have thrown any exception";