CORD-3134 make xossh ignore comments

Change-Id: I670df528a72ec5b246e54e388d23cdfd0dfdb1e2
diff --git a/xos/xos_client/xossh b/xos/xos_client/xossh
index 955eac0..daefecd 100644
--- a/xos/xos_client/xossh
+++ b/xos/xos_client/xossh
@@ -231,7 +231,7 @@
                 reactor.stop()
                 return
 
-            if command == "":
+            if (command == "") or (command.strip().startswith("#")):
                 # blank line
                 pass
             else: