Removed hard-coded list of receiver directories - now the script looks for them under the top_dir as appropriate.
Removed hard-coded list of receiver directories - now
the script looks for them under the top_dir as appropriate.

Remove the use of 'ls' and replace it by opendir/readdir/closedir


git-svn-id: a387e899ed10e03ab636af3ac21b4488e15ce2f7@446 a2d82226-602c-0410-bba7-e51b83dd10d2

perfsonar/owamp,perfsonar/owamp,perfsonar/owamp