fix Java client import in JSON (refs #8123)

Author: frantuma

modules/swagger-codegen/src/main/resources/Java/JSON.mustache

@@ -25,9 +25,9 @@ import org.threeten.bp.OffsetDateTime;
 import org.threeten.bp.format.DateTimeFormatter;
 {{/threetenbp}}
 
-{{#parent.length}}
+{{#models.0}}
 import {{modelPackage}}.*;
-{{/parent.length}}
+{{/models.0}}
 import okio.ByteString;
 
 import java.io.IOException;

modules/swagger-codegen/src/main/resources/Java/libraries/retrofit2/JSON.mustache

@@ -25,9 +25,9 @@ import org.threeten.bp.OffsetDateTime;
 import org.threeten.bp.format.DateTimeFormatter;
 {{/threetenbp}}
 
-{{#parent.length}}
+{{#models.0}}
 import {{modelPackage}}.*;
-{{/parent.length}}
+{{/models.0}}
 
 import java.io.IOException;
 import java.io.StringReader;

samples/client/petstore/java/okhttp-gson-parcelableModel/src/main/java/io/swagger/client/JSON.java

@@ -27,6 +27,7 @@
 import org.threeten.bp.OffsetDateTime;
 import org.threeten.bp.format.DateTimeFormatter;
 
+import io.swagger.client.model.*;
 import okio.ByteString;
 
 import java.io.IOException;

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/JSON.java

@@ -27,6 +27,7 @@
 import org.threeten.bp.OffsetDateTime;
 import org.threeten.bp.format.DateTimeFormatter;
 
+import io.swagger.client.model.*;
 import okio.ByteString;
 
 import java.io.IOException;

samples/client/petstore/java/okhttp-gson/src/test/java/io/swagger/client/api/DefaultApiTest.java

@@ -42,7 +42,7 @@ public void testEnumTest() {
         // test serialization
         Gson gson = new Gson();
         String json = gson.toJson(enumTest);
-        assertEquals(json, "{\"enum_string\":\"lower\",\"enum_string_required\":null,\"enum_integer\":1,\"enum_number\":1.1,\"outerEnum\":null}");
+        assertEquals(json, "{\"enum_string\":\"lower\",\"enum_integer\":1,\"enum_number\":1.1}");
         // test deserialization
         EnumTest fromString = gson.fromJson(json, EnumTest.class);
         assertEquals(fromString.getEnumString().toString(), "lower");

samples/client/petstore/java/okhttp-gson/src/test/java/io/swagger/client/model/EnumValueTest.java

@@ -27,6 +27,7 @@
 import org.threeten.bp.OffsetDateTime;
 import org.threeten.bp.format.DateTimeFormatter;
 
+import io.swagger.client.model.*;
 import okio.ByteString;
 
 import java.io.IOException;

samples/client/petstore/java/rest-assured/src/main/java/io/swagger/client/JSON.java

@@ -27,6 +27,7 @@
 import org.threeten.bp.OffsetDateTime;
 import org.threeten.bp.format.DateTimeFormatter;
 
+import io.swagger.client.model.*;
 
 import java.io.IOException;
 import java.io.StringReader;

samples/client/petstore/java/retrofit2/src/main/java/io/swagger/client/JSON.java

@@ -27,6 +27,7 @@
 import org.threeten.bp.OffsetDateTime;
 import org.threeten.bp.format.DateTimeFormatter;
 
+import io.swagger.client.model.*;
 
 import java.io.IOException;
 import java.io.StringReader;

samples/client/petstore/java/retrofit2rx/src/main/java/io/swagger/client/JSON.java

@@ -27,6 +27,7 @@
 import org.threeten.bp.OffsetDateTime;
 import org.threeten.bp.format.DateTimeFormatter;
 
+import io.swagger.client.model.*;
 
 import java.io.IOException;
 import java.io.StringReader;