Code Style for Jetty modules

Signed-off-by: Maxim Nesen <maxim.nesen@oracle.com>

containers/jetty-http/src/main/java/org/glassfish/jersey/jetty/JettyHttpContainerProvider.java

diff --git a/containers/jetty-http/src/main/java/org/glassfish/jersey/jetty/JettyHttpContainerProvider.java b/containers/jetty-http/src/main/java/org/glassfish/jersey/jetty/JettyHttpContainerProvider.java
index 63663fb..4b80825 100644
--- a/containers/jetty-http/src/main/java/org/glassfish/jersey/jetty/JettyHttpContainerProvider.java
+++ b/containers/jetty-http/src/main/java/org/glassfish/jersey/jetty/JettyHttpContainerProvider.java
@@ -31,15 +31,13 @@
  */
 public final class JettyHttpContainerProvider implements ContainerProvider {
 
+    public static final String HANDLER_NAME = "org.eclipse.jetty.server.Handler";
     @Override
     public <T> T createContainer(final Class<T> type, final Application application) throws ProcessingException {
         if (JdkVersion.getJdkVersion().getMajor() < 11) {
             throw new ProcessingException(LocalizationMessages.NOT_SUPPORTED());
         }
-        if (type != null
-                && ("org.eclipse.jetty.server.Handler".equalsIgnoreCase(type.getCanonicalName())
-                        || JettyHttpContainer.class == type)
-        ) {
+        if (type != null && (HANDLER_NAME.equalsIgnoreCase(type.getCanonicalName()) || JettyHttpContainer.class == type)) {
             return type.cast(new JettyHttpContainer(application));
         }
         return null;
@@ -50,10 +48,7 @@
         if (JdkVersion.getJdkVersion().getMajor() < 11) {
             throw new ProcessingException(LocalizationMessages.NOT_SUPPORTED());
         }
-        if (type != null
-                && ("org.eclipse.jetty.server.Handler".equalsIgnoreCase(type.getCanonicalName())
-                || JettyHttpContainer.class == type)
-        ) {
+        if (type != null && (HANDLER_NAME.equalsIgnoreCase(type.getCanonicalName()) || JettyHttpContainer.class == type)) {
             return type.cast(new JettyHttpContainer(application, parentContext));
         }
         return null;

containers/jetty-http2/src/main/java/org/glassfish/jersey/jetty/http2/JettyHttp2ContainerProvider.java

diff --git a/containers/jetty-http2/src/main/java/org/glassfish/jersey/jetty/http2/JettyHttp2ContainerProvider.java b/containers/jetty-http2/src/main/java/org/glassfish/jersey/jetty/http2/JettyHttp2ContainerProvider.java
index 5d8e6fd..01c61fc 100644
--- a/containers/jetty-http2/src/main/java/org/glassfish/jersey/jetty/http2/JettyHttp2ContainerProvider.java
+++ b/containers/jetty-http2/src/main/java/org/glassfish/jersey/jetty/http2/JettyHttp2ContainerProvider.java
@@ -25,6 +25,8 @@
 import jakarta.ws.rs.ProcessingException;
 import jakarta.ws.rs.core.Application;
 
+import static org.glassfish.jersey.jetty.JettyHttpContainerProvider.HANDLER_NAME;
+
 public final class JettyHttp2ContainerProvider implements ContainerProvider {
 
     @Override
@@ -32,12 +34,8 @@
         if (JdkVersion.getJdkVersion().getMajor() < 11) {
             throw new ProcessingException(LocalizationMessages.NOT_SUPPORTED());
         }
-        if (type != null
-                && ("org.eclipse.jetty.server.Handler".equalsIgnoreCase(type.getCanonicalName())
-                || JettyHttpContainer.class == type)
-        ) {
-            return type.cast(new JettyHttpContainerProvider().createContainer(JettyHttpContainer.class,
-                    application));
+        if (type != null && (HANDLER_NAME.equalsIgnoreCase(type.getCanonicalName()) || JettyHttpContainer.class == type)) {
+            return type.cast(new JettyHttpContainerProvider().createContainer(JettyHttpContainer.class, application));
         }
         return null;
     }