update spring samples

Author: wing328

samples/server/petstore/springboot-paged-model/src/main/java/org/openapitools/configuration/EnumConverterConfiguration.java

@@ -1,5 +1,9 @@
 package org.openapitools.configuration;
 
+import java.math.BigDecimal;
+import java.net.URI;
+import java.util.UUID;
+
 import org.openapitools.model.PetSort;
 
 import org.springframework.context.annotation.Bean;

samples/server/petstore/springboot-sort-validation/src/main/java/org/openapitools/configuration/EnumConverterConfiguration.java

@@ -1,5 +1,9 @@
 package org.openapitools.configuration;
 
+import java.math.BigDecimal;
+import java.net.URI;
+import java.util.UUID;
+
 import org.openapitools.model.PetSort;
 import org.openapitools.model.PetSortEnum;