NIFI-4848: Update HttpComponents version

- httpclient 4.5.3 -> 4.5.5
- httpcore 4.4.4 -> 4.4.9
  - ThreadSafe annotation is removed since 4.4.5, HTTPCLIENT-1743.
    Removed the annotation from DebugFlow processor.
- httpasyncclient 4.1.2 -> 4.1.3
- This closes apache#2453

nifi-commons/nifi-site-to-site-client/pom.xml

@@ -62,7 +62,7 @@
         <dependency>
             <groupId>org.apache.httpcomponents</groupId>
             <artifactId>httpasyncclient</artifactId>
-            <version>4.1.2</version>
+            <version>4.1.3</version>
         </dependency>
 
         <dependency>

nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/DebugFlow.java

@@ -28,7 +28,6 @@
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicReference;
 
-import org.apache.http.annotation.ThreadSafe;
 import org.apache.nifi.annotation.behavior.EventDriven;
 import org.apache.nifi.annotation.documentation.CapabilityDescription;
 import org.apache.nifi.annotation.documentation.Tags;
@@ -51,7 +50,6 @@
 import org.apache.nifi.processor.io.OutputStreamCallback;
 import org.apache.nifi.processor.util.StandardValidators;
 
-@ThreadSafe()
 @EventDriven()
 @Tags({"test", "debug", "processor", "utility", "flow", "FlowFile"})
 @CapabilityDescription("The DebugFlow processor aids testing and debugging the FlowFile framework by allowing various "

pom.xml

@@ -308,12 +308,12 @@
             <dependency>
                 <groupId>org.apache.httpcomponents</groupId>
                 <artifactId>httpclient</artifactId>
-                <version>4.5.3</version>
+                <version>4.5.5</version>
             </dependency>
             <dependency>
                 <groupId>org.apache.httpcomponents</groupId>
                 <artifactId>httpcore</artifactId>
-                <version>4.4.4</version>
+                <version>4.4.9</version>
             </dependency>
             <dependency>
                 <groupId>javax.mail</groupId>