feat: separate executor service for workflow

Author: csviri

operator-framework-core/src/main/java/io/javaoperatorsdk/operator/processing/dependent/workflow/builder/WorkflowBuilder.java

@@ -7,6 +7,7 @@
 
 import io.fabric8.kubernetes.api.model.HasMetadata;
 import io.javaoperatorsdk.operator.api.config.ConfigurationServiceProvider;
+import io.javaoperatorsdk.operator.api.config.ExecutorServiceManager;
 import io.javaoperatorsdk.operator.api.reconciler.dependent.DependentResource;
 import io.javaoperatorsdk.operator.processing.dependent.workflow.Condition;
 import io.javaoperatorsdk.operator.processing.dependent.workflow.DependentResourceNode;
@@ -75,8 +76,8 @@ public WorkflowBuilder<P> withThrowExceptionFurther(boolean throwExceptionFurthe
   }
 
   public Workflow<P> build() {
-    return new Workflow(dependentResourceNodes,
-        ConfigurationServiceProvider.instance().getExecutorService(), throwExceptionAutomatically);
+    return new Workflow(
+        dependentResourceNodes, ExecutorServiceManager.instance().executorService(), throwExceptionAutomatically);
   }
 
   public Workflow<P> build(int parallelism) {

sample-operators/webpage/src/main/java/io/javaoperatorsdk/operator/sample/WebPageOperator.java

@@ -1,7 +1,9 @@
 package io.javaoperatorsdk.operator.sample;
 
 import java.io.IOException;
+import java.util.function.Consumer;
 
+import io.javaoperatorsdk.operator.api.config.ConfigurationServiceOverrider;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.takes.facets.fork.FkRegex;

sample-operators/webpage/src/main/resources/log4j2.xml

@@ -2,7 +2,7 @@
 <Configuration status="WARN">
     <Appenders>
         <Console name="Console" target="SYSTEM_OUT">
-            <PatternLayout pattern="%style{%d}{yellow} %style{%-30c{1.}}{cyan} %highlight{[%-5level] %msg%n%throwable}{INFO=black}"/>
+            <PatternLayout pattern="%tn  %style{%d}{yellow} %style{%-30c{1.}}{cyan} %highlight{[%-5level] %msg%n%throwable}{INFO=black}"/>
         </Console>
     </Appenders>
     <Loggers>