Merge pull request react-bootstrap#5265 from kyletsang/test/fix-carousel-interval

test(Carousel): Fix test failure

Author: bpas247

test/CarouselSpec.js

@@ -128,7 +128,11 @@ describe('<Carousel>', () => {
       }
 
       const wrapper = mount(
-        <Carousel defaultActiveIndex={1} {...{ [eventName]: onEvent }}>
+        <Carousel
+          defaultActiveIndex={1}
+          interval={null}
+          {...{ [eventName]: onEvent }}
+        >
           {items}
         </Carousel>,
       );