Update app engine plugin and readmes for Java 11 (GoogleCloudPlatform#1424)

* Update plugin

* Update ReadMes

Author: averikitsch

appengine-java11/README.md

@@ -10,11 +10,6 @@ standard Java 11 environment.
 
 ## Prerequisites
 
-**Private Alpha**
-To access the Java 11 Google App Engine standard runtime, you'll need to apply
-to become part of the App Engine [Alpha program](https://docs.google.com/forms/d/e/1FAIpQLSf5uE5eknJjFEmcVBI6sMitBU0QQ1LX_J7VrA_OTQabo6EEEw/viewform).
-
-
 ### Download Maven
 
 These samples use the [Apache Maven][maven] build system. Before getting

appengine-java11/appengine-simple-jetty-main/README.md

@@ -0,0 +1,5 @@
+# Embedded Jetty Server for running WAR files on Google App Engine Standard with Java 11
+
+This sample demonstrates an embedded Jetty server which instantiates an HTTP server to run a WAR file.
+
+For more information on the Java 11 runtime, see [Migrating your App Engine app from Java 8 to Java 11](https://cloud.google.com/appengine/docs/standard/java11/java-differences).

appengine-java11/custom-entrypoint/README.md

@@ -1,4 +1,4 @@
-# Hello World App for Google App Engine Standard with Java 11
+# Using a Custom Entrypoint on Google App Engine Standard with Java 11
 
 This sample shows how to deploy an application to Google App Engine, using the
 `entrypoint` element in the [app.yaml](app.yaml) to start your application. The

appengine-java11/gaeinfo/pom.xml

@@ -124,7 +124,7 @@ Copyright 2019 Google LLC
       <plugin>
         <groupId>com.google.cloud.tools</groupId>
         <artifactId>appengine-maven-plugin</artifactId>
-        <version>2.0.0-rc6</version>
+        <version>2.0.0</version>
         <configuration>
           <version>gaeinfo</version>
         </configuration>

appengine-java11/guestbook-cloud-firestore/pom.xml

@@ -80,7 +80,7 @@
       <plugin>
         <groupId>com.google.cloud.tools</groupId>
         <artifactId>appengine-maven-plugin</artifactId>
-        <version>2.0.0-rc6</version>
+        <version>2.0.0</version>
         <configuration>
           <version>guestbook</version>
         </configuration>

appengine-java11/http-server/README.md

@@ -1,4 +1,4 @@
-# Single Fat Jar Application on Google App Engine Standard with Java 11
+# Standalone HTTP Server on Google App Engine Standard with Java 11
 
 This sample shows how to deploy an application to Google App Engine using the
 a fat jar. There is no `entrypoint` field listed in the [`app.yaml`](src/main/appengine/app.yaml),

appengine-java11/http-server/pom.xml

@@ -37,7 +37,7 @@
       <plugin>
         <groupId>com.google.cloud.tools</groupId>
         <artifactId>appengine-maven-plugin</artifactId>
-        <version>2.0.0-rc6</version>
+        <version>2.0.0</version>
         <configuration>
           <version>http-server</version>
         </configuration>

appengine-java11/kotlin-ktor/pom.xml

@@ -165,7 +165,7 @@ limitations under the License.
             <plugin>
                 <groupId>com.google.cloud.tools</groupId>
                 <artifactId>appengine-maven-plugin</artifactId>
-                <version>2.0.0-rc6</version>
+                <version>2.0.0</version>
                 <configuration>
                     <version>kotlin-ktor</version>
                     <!-- Ktor generator moved from Maven convention of src/main/* to simply th top level project directory -->

appengine-java11/micronaut-helloworld/pom.xml

@@ -112,7 +112,7 @@
       <plugin>
         <groupId>com.google.cloud.tools</groupId>
         <artifactId>appengine-maven-plugin</artifactId>
-        <version>2.0.0-rc6</version>
+        <version>2.0.0</version>
         <configuration>
           <version>micronaut-helloworld</version>
         </configuration>

appengine-java11/oauth2/pom.xml

@@ -98,7 +98,7 @@
             <plugin>
                 <groupId>com.google.cloud.tools</groupId>
                 <artifactId>appengine-maven-plugin</artifactId>
-                <version>2.0.0-rc6</version>
+                <version>2.0.0</version>
                 <configuration>
                     <version>oauth2</version>
                 </configuration>