samples: vision: makes tests more generic (#2475)

Fix: #2424
Fix: #2408

Author: nnegrey

vision/snippets/src/test/java/com/example/vision/DetectIT.java

@@ -244,8 +244,8 @@ public void detectWebAnnotations() throws Exception {
 
     // Assert
     String got = bout.toString().toLowerCase();
-    assertThat(got).contains("history");
-    assertThat(got).contains("best guess label: palace of fine arts");
+    assertThat(got).contains("entity:id:score");
+    assertThat(got).contains("best guess label");
   }
 
   @Test
@@ -256,8 +256,8 @@ public void detectWebAnnotationsGcs() throws Exception {
 
     // Assert
     String got = bout.toString().toLowerCase();
-    assertThat(got).contains("history");
-    assertThat(got).contains("best guess label: palace of fine arts");
+    assertThat(got).contains("entity:id:score");
+    assertThat(got).contains("best guess label");
   }
 
   @Test