[ops] Set kill script to always return true

production/mempool-kill-all

@@ -1,8 +1,21 @@
 #!/usr/bin/env zsh
+
+# kill "while true" loops
 killall sh
+
+# kill actual node backends
 killall node
+
+# kill unfurler chrome instances
 killall chrome
+
+# kill xorg
 killall xinit
+
+# kill nginx cache warmer scripts
 for pid in `ps uaxww|grep warmer|grep zsh|awk '{print $2}'`;do
     kill $pid
 done
+
+# always exit successfully despite above errors
+exit 0