convert apache logs to color for screen

If we left the ansi color codes in apache logs, we can run a sed
script to convert the escaped escapes back to ansi escapes which make
the logs colorized again.

There are 8 \ because we need to end up with 2 in the final sed, and
we get interopolated twice. How much fun is escape interpolation? All
the fun.

Change-Id: Id8531cf03ba80f0df62f20add02e757bd63d4f2d
diff --git a/functions-common b/functions-common
index 3fdd71b..7524eab 100644
--- a/functions-common
+++ b/functions-common
@@ -1686,7 +1686,7 @@
     local logfile=$2
 
     if [[ "$USE_SCREEN" = "True" ]]; then
-        screen_process "$name" "sudo tail -f $logfile"
+        screen_process "$name" "sudo tail -f $logfile | sed 's/\\\\\\\\x1b/\o033/g'"
     fi
 }