Fix thread leaking

Author: nygrenh

build.xml

@@ -10,7 +10,7 @@
 
     <target name="-check-mavenmodules">
         <uptodate property="mavenmodules.uptodate"
-                  srcfile="maven-wrapper/target/nbm/maven-wrapper-1.14.nbm"
+                  srcfile="maven-wrapper/target/nbm/maven-wrapper-1.15.nbm"
                   targetfile="mavenmodules"/>
     </target>
 

maven-wrapper/pom.xml

@@ -4,7 +4,7 @@
 
     <groupId>fi.helsinki.cs.tmc</groupId>
     <artifactId>maven-wrapper</artifactId>
-    <version>1.14</version>
+    <version>1.15</version>
     <packaging>nbm</packaging>
 
     <name>TMC Maven Wrapper</name>
@@ -46,7 +46,7 @@
         <dependency>
             <groupId>${project.groupId}</groupId>
             <artifactId>core</artifactId>
-            <version>0.9.12-SNAPSHOT</version>
+            <version>0.9.13-SNAPSHOT</version>
         </dependency>
         <dependency>
             <groupId>${project.groupId}</groupId>
@@ -105,12 +105,12 @@
         <dependency>
             <groupId>org.cometd.java</groupId>
             <artifactId>cometd-java-client</artifactId>
-            <version>3.0.3</version>
+            <version>3.1.2</version>
         </dependency>
         <dependency>
             <groupId>org.cometd.java</groupId>
             <artifactId>cometd-java-websocket-javax-client</artifactId>
-            <version>3.0.3</version>
+            <version>3.1.2</version>
         </dependency>
         <dependency>
             <groupId>org.slf4j</groupId>
@@ -121,7 +121,7 @@
         <dependency>
             <groupId>org.eclipse.jetty.websocket</groupId>
             <artifactId>javax-websocket-client-impl</artifactId>
-            <version>9.2.5.v20141112</version>
+            <version>9.4.6.v20170531</version>
         </dependency>
 
     </dependencies>

tmc-plugin/src/fi/helsinki/cs/tmc/actions/TmcModuleInstall.java

@@ -52,7 +52,10 @@ public void run() {
                 CheckForNewExercisesOrUpdates.startTimer();
                 CheckForNewReviews.startTimer();
                 ReviewEventListener.start();
-                PushEventListener.start();
+                // Push events are disabled for now since this spams threads and
+                // its functionality is rarely used since code reviews trigger
+                // an email notification.
+                // PushEventListener.start();
                 TmcSettings settings = TmcSettingsHolder.get();
                 SpywareFacade.start();