Small fix for name

Author: szamfirov

src/main/java/cd/go/authorization/okta/models/User.java

@@ -26,7 +26,7 @@ public class User {
     private String username;
 
     @Expose
-    @SerializedName("name")
+    @SerializedName("display_name")
     private String displayName;
 
     @Expose

src/test/java/cd/go/authorization/okta/executors/UserAuthenticationRequestExecutorTest.java

@@ -86,7 +86,7 @@ public void shouldAuthenticate() throws Exception {
                 "  \"roles\": [],\n" +
                 "  \"user\": {\n" +
                 "    \"username\": \"foo@bar.com\",\n" +
-                "    \"name\": \"Foo Bar\",\n" +
+                "    \"display_name\": \"Foo Bar\",\n" +
                 "    \"email\": \"foo@bar.com\"\n" +
                 "  }\n" +
                 "}";

src/test/java/cd/go/authorization/okta/models/UserTest.java

@@ -29,7 +29,7 @@ public class UserTest {
     @Test
     public void shouldSerializeToJSON() throws Exception {
         final User user = new User("foo", "bar", "baz");
-        final String expectedJSON = "{\"username\":\"foo\",\"name\":\"bar\",\"email\":\"baz\"}";
+        final String expectedJSON = "{\"username\":\"foo\",\"display_name\":\"bar\",\"email\":\"baz\"}";
 
         JSONAssert.assertEquals(expectedJSON, GSON.toJson(user), true);
     }