Updated maven-plugin & mailer dependencies so that HelpLinkTest will pass.

pom.xml

@@ -94,7 +94,7 @@ THE SOFTWARE.
     <patch.tracker.serverId>jenkins-jira</patch.tracker.serverId>
 
     <slf4jVersion>1.7.4</slf4jVersion> <!-- < 1.6.x version didn't specify the license (MIT) -->
-    <maven-plugin.version>2.0</maven-plugin.version>
+    <maven-plugin.version>2.1</maven-plugin.version>
     <netbeans.compile.on.save>none</netbeans.compile.on.save> <!-- we rely on Maven source generation -->
     <animal.sniffer.skip>${skipTests}</animal.sniffer.skip>
 

test/pom.xml

@@ -79,7 +79,7 @@ THE SOFTWARE.
     <dependency>
       <groupId>org.jenkins-ci.plugins</groupId>
       <artifactId>mailer</artifactId>
-      <version>1.5</version>
+      <version>1.8</version>
     </dependency>
     <dependency>
       <groupId>org.jenkins-ci.plugins</groupId>