Upgrade atmosphere to 2.4.24.vaadin1 (#10847)

Fixes #10816

pom.xml

@@ -35,7 +35,7 @@
         <javax.portlet.version>2.0</javax.portlet.version>
         <vaadin.sass.version>0.9.13</vaadin.sass.version>
         <!-- Note that this should be kept in sync with the class Constants -->
-        <atmosphere.runtime.version>2.4.21.vaadin1</atmosphere.runtime.version>
+        <atmosphere.runtime.version>2.4.24.vaadin1</atmosphere.runtime.version>
 
         <!-- OSGi -->
         <osgi.execution.environment>JavaSE-1.8</osgi.execution.environment>
@@ -353,7 +353,6 @@
             <scope>test</scope>
         </dependency>
     </dependencies>
-
     <build>
         <pluginManagement>
             <plugins>

server/src/main/java/com/vaadin/server/Constants.java

@@ -66,7 +66,7 @@ public interface Constants {
             + "=================================================================";
 
     // Keep the version number in sync with pom.xml
-    static final String REQUIRED_ATMOSPHERE_RUNTIME_VERSION = "2.4.21.vaadin1";
+    static final String REQUIRED_ATMOSPHERE_RUNTIME_VERSION = "2.4.24.vaadin1";
 
     static final String INVALID_ATMOSPHERE_VERSION_WARNING = "\n"
             + "=================================================================\n"