test: re-fetch collection config before assertions

Author: bevzzz

src/it/java/io/weaviate/integration/CollectionsITest.java

@@ -362,6 +362,7 @@ public void test_dropPropertyIndex() throws IOException {
     things.config.dropPropertyIndex("size", PropertyIndexType.FILTERABLE);
     things.config.dropPropertyIndex("size", PropertyIndexType.RANGE_FILTERS);
 
+    config = things.config.get();
     Assertions.assertThat(config).get()
         .extracting(CollectionConfig::properties, InstanceOfAssertFactories.list(Property.class))
         .allSatisfy(property -> Assertions.assertThat(property)

src/main/java/io/weaviate/client6/v1/api/collections/config/PropertyIndexType.java

@@ -11,6 +11,7 @@ private PropertyIndexType(String value) {
     this.value = value;
   }
 
+  @Override
   public String toString() {
     return value;
   }