better pac4j integration

- add default action when user is not authenticated yet. fix #1147
- Problem upgrade to jooby 1.4 and pac4j2 fix #1128

Author: jknack

jooby/src/main/java/org/jooby/Jooby.java

@@ -218,6 +218,7 @@
 import com.google.inject.Injector;
 import com.google.inject.Key;
 import com.google.inject.Provider;
+import com.google.inject.ProvisionException;
 import com.google.inject.Stage;
 import com.google.inject.TypeLiteral;
 import com.google.inject.internal.ProviderMethodsModule;
@@ -1203,7 +1204,15 @@ public Jooby on(final String env1, final String env2, final String env3,
   public <T> T require(final Key<T> type) {
     checkState(injector != null,
         "Registry is not ready. Require calls are available at application startup time, see http://jooby.org/doc/#application-life-cycle");
-    return injector.getInstance(type);
+    try {
+      return injector.getInstance(type);
+    } catch (ProvisionException x) {
+      Throwable cause = x.getCause();
+      if (cause instanceof Err) {
+        throw (Err) cause;
+      }
+      throw x;
+    }
   }
 
   @Override