Update test to match InterruptedException guidelines

Author: garydgregory

src/test/java/org/apache/commons/dbcp2/datasources/TestSharedPoolDataSource.java

@@ -442,8 +442,8 @@ void testDbcp369() {
         try {
             t1.join();
             t2.join();
-        } catch (final InterruptedException ie) {
-            // Ignore
+        } catch (final InterruptedException e) {
+            Thread.currentThread().interrupt();
         }
     }