Adding AWS AppSync based on customer request.

Author: kiiadi

services/appsync/pom.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <artifactId>services</artifactId>
+        <groupId>software.amazon.awssdk</groupId>
+        <version>2.0.0-preview-6-SNAPSHOT</version>
+    </parent>
+
+    <artifactId>appsync</artifactId>
+    <name>AWS Java SDK :: Services :: AWS AppSync</name>
+    <description>The AWS Java SDK for Amazon AppSync module holds the client classes that are used for communicating
+        with Amazon AppSync.
+    </description>
+
+</project>

services/appsync/src/main/resources/codegen-resources/codegen.config

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+{
+    "serviceInterfaceName": "AWSAppSync",
+    "defaultEndpoint": "appsync.us-east-1.amazonaws.com"
+}

services/appsync/src/main/resources/codegen-resources/customization.config

@@ -0,0 +1,5 @@
+{
+     "authPolicyActions" : {
+         "skip" : true
+     }
+}

services/appsync/src/main/resources/codegen-resources/examples-1.json

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+{
+  "version": "1.0",
+  "examples": {
+  }
+}

services/appsync/src/main/resources/codegen-resources/paginators-1.json

@@ -0,0 +1,4 @@
+{
+  "pagination": {
+  }
+}