Wait for maven to finish deploying

The test builds a maven package in a docker container. The build
process can take a very different amount of time depending on how
long it takes to download all the dependencies and build.

There is an issue open to improve the test, but for now we make it
wait up to 5 minutes to build and deploy. We stop the container as
soon as deployment is complete so that it doesn't wait the full 5
minutes.

We also force delete the temp directory used to store the source for
the package because it seems to take some time for docker to release
the files after the container is stopped.

qa/qa/runtime/fixtures.rb

@@ -30,7 +30,7 @@ module QA
 
         yield dir
       ensure
-        FileUtils.remove_entry(dir)
+        FileUtils.remove_entry(dir, true)
       end
 
       private

qa/qa/service/docker_run/maven.rb

@@ -27,10 +27,16 @@ module QA
             --hostname #{host_name}
             --name #{@name}
             --volume #{@volume_host_path}:/home/maven
-            #{@image} sh -c "sleep 60"
+            #{@image} sh -c "sleep 300"
           CMD
           shell "docker cp #{@volume_host_path}/. #{@name}:/home/maven"
           shell "docker exec -t #{@name} sh -c 'cd /home/maven && mvn deploy -s settings.xml'"
+
+          # Stop the container when `mvn deploy` is finished otherwise
+          # the sleeping container will hold onto the files in @volume_host_path,
+          # which causes problems when they're created in a tmp dir
+          # that we want to delete
+          shell "docker stop #{@name}"
         end
       end
     end