RAD-5256 (#1859)

* RAD-5256 Adding afterTest method to delete the data source between tests cases.

* RAD-5256 removing unused import

---------

Co-authored-by: Benjamin Perez <benji811124@users.noreply.github.com>

Core/src-test/com/infiniteautomation/mango/spring/service/EventInstanceWithTagsQueryTest.java

@@ -16,6 +16,7 @@
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
+import org.junit.After;
 import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Test;
@@ -69,6 +70,8 @@ public class EventInstanceWithTagsQueryTest extends MangoTestBase {
     private User point2User;
     private User allUser;
 
+    private MockDataSourceVO ds;
+
     private final Random random = new Random();
 
     @Before
@@ -82,12 +85,13 @@ public void before(){
 
         setupRoles();
 
+
         AtomicInteger count = new AtomicInteger();
         List<String> tagKeys = Stream.generate(() -> "key" + count.getAndIncrement())
                 .limit(2).collect(Collectors.toList());
         allTags = tagKeys.stream().collect(Collectors.toMap(Function.identity(), k -> k + "_value" + random.nextInt(10)));
 
-        MockDataSourceVO ds = createMockDataSource(true);
+        ds = createMockDataSource(true);
 
         //Insert 2 data points
         point1 = createMockDataPoint(ds, (dp) -> {
@@ -125,6 +129,12 @@ public void before(){
         });
     }
 
+    @After
+    public void afterTest(){
+        DataSourceService service = Common.getBean(DataSourceService.class);
+        service.delete(ds);
+    }
+
     @Test
     public void testTagQuery() {