fixed a context loading issue

jams-launcher/src/main/java/launcher/AppStarter.java

@@ -87,7 +87,6 @@ public class AppStarter extends Thread {
                 }
                 if(doUpdate.get()){
                     Server.tomcatLauncher.stopTomcat();
-                    server = null;
                     //This will trigger a force reload of the lib.
                     LibraryLoader.loadlibs(System.getProperty("user.dir"), AppStarter.class);
                     server = ServerLoader.loadServer(appUpdater, Integer.toString(port), serverCertificate, serverPrivateKey);

jams-server/src/main/java/net/jami/jams/server/Server.java

@@ -55,7 +55,6 @@ import java.util.concurrent.atomic.AtomicBoolean;
 
 @Slf4j
 //In order to make this "stoppable" to simply, I turned the server itself into a thread.
-//The reasoning: the main two problems
 public class Server {
 
     public final static AtomicBoolean isInstalled = new AtomicBoolean(false);

jams-server/src/main/java/net/jami/jams/server/core/TomcatLauncher.java

@@ -52,8 +52,8 @@ import static net.jami.jams.server.Server.certificateAuthority;
 @Slf4j
 public class TomcatLauncher {
 
-    private static final Tomcat tomcat = new Tomcat();
-    private static StandardContext context;
+    private final Tomcat tomcat = new Tomcat();
+    private StandardContext context;
 
     public TomcatLauncher(int port) {
         tomcat.getService().addConnector(TomcatConnectorFactory.getNoSSLConnector(port));