Fix Swift process kill

stop_swift() was not killing all swift processes properly.  Change to
manually clean up all screen services with pkill.

Closes-bug: 1268794
Change-Id: Ibb7a2e0dd10a313609f05963264087f82f6f00e2
diff --git a/lib/swift b/lib/swift
index 44c230b..37b630c 100644
--- a/lib/swift
+++ b/lib/swift
@@ -652,8 +652,10 @@
     if type -p swift-init >/dev/null; then
         swift-init --run-dir=${SWIFT_DATA_DIR}/run all stop || true
     fi
-    # Dump the proxy server
-    sudo pkill -f swift-proxy-server
+    for type in proxy object container account; do
+        # Dump all of the servers
+        pkill -f swift-
+    done
 }
 
 # Restore xtrace