[NO ISSUE] Minor active refactoring

- Remove unused ActiveRuntimeManager
- Rename StatsRequestMessage -> ActiveStatsRequestMessage
- Add ActiveManager API to return all active runtimes
- Interrupt running HTTP requests after 5s upon shutdown
- Log thread dump when HTTP requests do not complete after interruption

Change-Id: I79249f7cd42496d6679eb9b0acbe8cda1892f9d3
Reviewed-on: https://asterix-gerrit.ics.uci.edu/2021
Sonar-Qube: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Michael Blow <mblow@apache.org>
Tested-by: Michael Blow <mblow@apache.org>
diff --git a/hyracks-fullstack/hyracks/hyracks-http/pom.xml b/hyracks-fullstack/hyracks/hyracks-http/pom.xml
index ed0e8c8..09bf513 100644
--- a/hyracks-fullstack/hyracks/hyracks-http/pom.xml
+++ b/hyracks-fullstack/hyracks/hyracks-http/pom.xml
@@ -66,5 +66,10 @@
       <artifactId>junit</artifactId>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.apache.hyracks</groupId>
+      <artifactId>hyracks-util</artifactId>
+      <version>${project.version}</version>
+    </dependency>
   </dependencies>
 </project>
\ No newline at end of file