Fix mvm cloud sql sample for local run

Author: Shun Fan

managed_vms/cloudsql/README.md

@@ -24,6 +24,8 @@ Before you can run or deploy the sample, you will need to do the following:
 1. Set the connection string environment variable in src/main/appengine/app.yaml
 
 ## Running locally
+    Export local variables
+    $ export SQL_URL="jdbc:mysql://google/YOUR-DB-NAME?cloudSqlInstance=YOUR-INSTANCE-NAME&socketFactory=com.google.cloud.sql.mysql.SocketFactory&user=USERNAME&password=PASSWORD"
     $ mvn clean jetty:run
 
 ## Deploying

managed_vms/cloudsql/pom.xml

@@ -37,11 +37,6 @@ Copyright 2016 Google Inc. All Rights Reserved.
       <scope>provided</scope>
     </dependency>
     <!-- [START dependencies] -->
-    <dependency>                        <!-- http://dev.mysql.com/doc/connector-j/en/ -->
-      <groupId>mysql</groupId>
-      <artifactId>mysql-connector-java</artifactId>
-      <version>6.0.3</version>
-    </dependency>
     <dependency>
       <groupId>com.google.cloud.sql</groupId>
       <artifactId>mysql-socket-factory</artifactId>

managed_vms/cloudsql/src/main/appengine/app.yaml

@@ -22,6 +22,5 @@ handlers:
 
 # [START env_variables]
 env_variables:
-  SQL_REMOTE_URL: jdbc:mysql://google/YOUR-DB-NAME?cloudSqlInstance=YOUR-INSTANCE-NAME&socketFactory=com.google.cloud.sql.mysql.SocketFactory&user=USERNAME&password=PASSWORD
-  SQL_LOCAL_URL: jdbc:mysql://localhost/YOUR-DB-NAME?user=YOUR-USERNAME&password=PASSWORD&useSSL=false
+  SQL_URL: jdbc:mysql://google/YOUR-DB-NAME?cloudSqlInstance=YOUR-INSTANCE-NAME&socketFactory=com.google.cloud.sql.mysql.SocketFactory&user=USERNAME&password=PASSWORD
 # [END env_variables]

managed_vms/cloudsql/src/main/java/com/example/managedvms/cloudsql/CloudSqlServlet.java

@@ -65,12 +65,7 @@ public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOExc
     PrintWriter out = resp.getWriter();
     resp.setContentType("text/plain");
     // Detect if running remotely or locally and select correct connection url
-    String url;
-    if (System.getenv().containsKey("GAE_MODULE_INSTANCE")) {
-      url = System.getenv("SQL_REMOTE_URL");
-    } else {
-      url = System.getenv("SQL_LOCAL_URL");
-    }
+    String url = System.getenv("SQL_URL");
 
     try (Connection conn = DriverManager.getConnection(url);
         PreparedStatement statementCreateVisit = conn.prepareStatement(createVisitSql)) {