AMBARI-16852 Update metrics collector pom.xml to use httpclient-4.2.5.jar (qinliu via dsen)

ambari-metrics/ambari-metrics-timelineservice/pom.xml

@@ -410,6 +410,11 @@
       <artifactId>jersey-client</artifactId>
       <version>1.11</version>
     </dependency>
+    <dependency>
+      <groupId>org.apache.httpcomponents</groupId>
+      <artifactId>httpclient</artifactId>
+      <version>4.2.5</version>
+    </dependency>
     <dependency>
       <groupId>com.google.guava</groupId>
       <artifactId>guava</artifactId>