streamclone: remove sleep based "synchronisation" in tests
Sleep based test synchronisation does not work.
Variation in machine performance and load can make the two process miss their
windows. Instead we migrate to explicit signaling through the file system as
other tests file are using.
Differential Revision: https://phab.mercurial-scm.org/D10478
{
// Enforcing
"eqeqeq" : true, // true: Require triple equals (===) for comparison
"forin" : true, // true: Require filtering for..in loops with obj.hasOwnProperty()
"freeze" : true, // true: prohibits overwriting prototypes of native objects such as Array, Date etc.
"nonbsp" : true, // true: Prohibit "non-breaking whitespace" characters.
"undef" : true, // true: Require all non-global variables to be declared (prevents global leaks)
// Environments
"browser" : true // Web Browser (window, document, etc)
}