[Java] fix Java (Jersey1.x) test case (#4239)

* fix java jersey 1 test case

* fix test for java jersey2.x api client

samples/client/petstore/java/retrofit/hello.txt

@@ -0,0 +1 @@
+Hello world!

samples/client/petstore/java/retrofit/src/main/java/io/swagger/client/model/EnumTest.java

@@ -17,6 +17,7 @@ import java.util.Objects;
 import com.google.gson.annotations.SerializedName;
 import io.swagger.annotations.ApiModel;
 import io.swagger.annotations.ApiModelProperty;
+import io.swagger.client.model.OuterEnum;
 
 /**
  * EnumTest
@@ -98,6 +99,9 @@ public class EnumTest {
   @SerializedName("enum_number")
   private EnumNumberEnum enumNumber = null;
 
+  @SerializedName("outerEnum")
+  private OuterEnum outerEnum = null;
+
   public EnumTest enumString(EnumStringEnum enumString) {
     this.enumString = enumString;
     return this;
@@ -152,6 +156,24 @@ public class EnumTest {
     this.enumNumber = enumNumber;
   }
 
+  public EnumTest outerEnum(OuterEnum outerEnum) {
+    this.outerEnum = outerEnum;
+    return this;
+  }
+
+   /**
+   * Get outerEnum
+   * @return outerEnum
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public OuterEnum getOuterEnum() {
+    return outerEnum;
+  }
+
+  public void setOuterEnum(OuterEnum outerEnum) {
+    this.outerEnum = outerEnum;
+  }
+
 
   @Override
   public boolean equals(java.lang.Object o) {
@@ -164,12 +186,13 @@ public class EnumTest {
     EnumTest enumTest = (EnumTest) o;
     return Objects.equals(this.enumString, enumTest.enumString) &&
         Objects.equals(this.enumInteger, enumTest.enumInteger) &&
-        Objects.equals(this.enumNumber, enumTest.enumNumber);
+        Objects.equals(this.enumNumber, enumTest.enumNumber) &&
+        Objects.equals(this.outerEnum, enumTest.outerEnum);
   }
 
   @Override
   public int hashCode() {
-    return Objects.hash(enumString, enumInteger, enumNumber);
+    return Objects.hash(enumString, enumInteger, enumNumber, outerEnum);
   }
 
 
@@ -181,6 +204,7 @@ public class EnumTest {
     sb.append("    enumString: ").append(toIndentedString(enumString)).append("\n");
     sb.append("    enumInteger: ").append(toIndentedString(enumInteger)).append("\n");
     sb.append("    enumNumber: ").append(toIndentedString(enumNumber)).append("\n");
+    sb.append("    outerEnum: ").append(toIndentedString(outerEnum)).append("\n");
     sb.append("}");
     return sb.toString();
   }

samples/client/petstore/java/retrofit/src/main/java/io/swagger/client/model/OuterEnum.java

@@ -0,0 +1,45 @@
+/*
+ * Swagger Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ */
+
+
+package io.swagger.client.model;
+
+import java.util.Objects;
+import com.google.gson.annotations.SerializedName;
+
+
+/**
+ * Gets or Sets OuterEnum
+ */
+public enum OuterEnum {
+  
+  @SerializedName("placed")
+  PLACED("placed"),
+  
+  @SerializedName("approved")
+  APPROVED("approved"),
+  
+  @SerializedName("delivered")
+  DELIVERED("delivered");
+
+  private String value;
+
+  OuterEnum(String value) {
+    this.value = value;
+  }
+
+  @Override
+  public String toString() {
+    return String.valueOf(value);
+  }
+}
+