BOOKKEEPER-881: Upgrade surefire plugin to 2.19.1

Upgrade to using maven surefire plugin version 2.19.1

Author: Rithin Shetty <rithingmail.com>

Author: Rithin <rithin.shetty@salesforce.com>

Reviewers: Matteo Merli <mmerli@apache.org>

Closes #47 from rithin-shetty/surefire-upgrade
diff --git a/pom.xml b/pom.xml
index 56a4345..4f40773 100644
--- a/pom.xml
+++ b/pom.xml
@@ -70,7 +70,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
-        <version>2.9</version>
+        <version>2.19.1</version>
         <configuration>
           <argLine>-Xmx2G -Djava.net.preferIPv4Stack=true</argLine>
 	  <redirectTestOutputToFile>true</redirectTestOutputToFile>