Speed up development server again by not eagerly initing all servlets

Change-Id: Iee32ef894cb50a4322f04250997ecfe032e570b1

WebContent/WEB-INF/web.xml

@@ -25,7 +25,7 @@
             <param-value>com.vaadin.tests.components.button.Buttons</param-value>
         </init-param>
         <async-supported>true</async-supported>
-        <load-on-startup>1</load-on-startup>
+        <load-on-startup>-1</load-on-startup>
     </servlet>
     <servlet>
         <servlet-name>Embed App 2</servlet-name>
@@ -35,7 +35,7 @@
             <param-value>com.vaadin.tests.components.label.MarginsInLabels</param-value>
         </init-param>
         <async-supported>true</async-supported>
-        <load-on-startup>2</load-on-startup>
+        <load-on-startup>-1</load-on-startup>
     </servlet>
     <servlet>
         <servlet-name>UI provider app</servlet-name>
@@ -49,7 +49,7 @@
             <param-value>com.vaadin.tests.VerifyAssertionsEnabled</param-value>
         </init-param>
         <async-supported>true</async-supported>
-        <load-on-startup>3</load-on-startup>
+        <load-on-startup>-1</load-on-startup>
     </servlet>
 
     <servlet>
@@ -77,7 +77,7 @@
             <param-value>42</param-value>
         </init-param>
         <async-supported>true</async-supported>
-        <load-on-startup>4</load-on-startup>
+        <load-on-startup>-1</load-on-startup>
     </servlet>
 
     <servlet>
@@ -88,7 +88,7 @@
         -->
         <servlet-name>VaadinApplicationRunnerWithTimeoutRedirect</servlet-name>
         <servlet-class>com.vaadin.launcher.ApplicationRunnerServlet</servlet-class>
-        <load-on-startup>5</load-on-startup>
+        <load-on-startup>-1</load-on-startup>
     </servlet>
     
     <servlet>
@@ -99,7 +99,7 @@
             <param-value>automatic</param-value>
         </init-param>
         <async-supported>true</async-supported>
-        <load-on-startup>6</load-on-startup>
+        <load-on-startup>-1</load-on-startup>
     </servlet>
 
     <!-- For testing GAE - the deployment script changes this to use GAEVaadinServlet -->
@@ -111,7 +111,7 @@
             <param-value>com.vaadin.tests.integration.ServletIntegrationUI</param-value>
         </init-param>
         <async-supported>true</async-supported>
-        <load-on-startup>7</load-on-startup>
+        <load-on-startup>-1</load-on-startup>
     </servlet>
     <servlet-mapping>
         <servlet-name>Embed App 1</servlet-name>