Fix failing URL test

Author: adimiz1

cloudinary-core/src/main/java/com/cloudinary/Url.java

@@ -418,7 +418,7 @@ public String generate(String source) {
             } catch (MalformedURLException ignored) {
             }
         }
-        if (cloudinary.config.analytics) {
+        if (cloudinary.config.analytics != null && cloudinary.config.analytics) {
             try {
                 URL tempUrl = new URL(url);
                 // if any other query param already exist on the URL do not add analytics query param.

cloudinary-core/src/test/java/com/cloudinary/analytics/AnalyticsTest.java

@@ -78,17 +78,15 @@ public void testUrlWithNoAnalyticsDefined() {
 
     @Test
     public void testUrlWithNoAnalyticsNull() {
-        cloudinary.analytics = null;
         String url = cloudinary.url().generate("test");
         Assert.assertEquals(url, "http://res.cloudinary.com/test123/image/upload/test");
     }
 
     @Test
     public void testUrlWithNoAnalyticsNullAndTrue() {
         cloudinary.config.analytics = true;
-        cloudinary.analytics = null;
         String url = cloudinary.url().generate("test");
-        Assert.assertEquals(url, "http://res.cloudinary.com/test123/image/upload/test");
+        Assert.assertEquals(url, "http://res.cloudinary.com/test123/image/upload/test?_a=AGAtVAN0");
     }
 
     @Test