CI: FileWatching error on macOS

[StefanKarpinski]

For example: https://travis-ci.org/JuliaLang/julia/jobs/362508394

[vtjnash]

I think the test is probably just too strict, and needs someone to look into it and decide on the appropriate resolution.

[ViralBShah]

FWIW, I have seen it on my mac locally a few times too.

[staticfloat]

It looks like the issue is that the events we're getting are out-of-order;

Some tests did not pass: 473 passed, 5 failed, 0 errored, 0 broken.FileWatching: Test Failed at /private/tmp/julia/share/julia/site/v0.7/FileWatching/test/runtests.jl:401
  Expression: pop!(changes) == (F_PATH => FileWatching.FileEvent(FileWatching.UV_RENAME))
   Evaluated: "afile.txt3" => FileWatching.FileEvent(true, false, false) == "afile.txt" => FileWatching.FileEvent(true, false, false)
FileWatching: Test Failed at /private/tmp/julia/share/julia/site/v0.7/FileWatching/test/runtests.jl:405
  Expression: pop!(changes) == (F_PATH * "~" => FileWatching.FileEvent(FileWatching.UV_RENAME))
   Evaluated: "afile.txt2" => FileWatching.FileEvent(true, false, false) == "afile.txt~" => FileWatching.FileEvent(true, false, false)
FileWatching: Test Failed at /private/tmp/julia/share/julia/site/v0.7/FileWatching/test/runtests.jl:417
  Expression: pop!(changes) == ("$(F_PATH)$(i)" => FileWatching.FileEvent(FileWatching.UV_RENAME))
   Evaluated: "afile.txt" => FileWatching.FileEvent(false, true, false) == "afile.txt3" => FileWatching.FileEvent(true, false, false)
FileWatching: Test Failed at /private/tmp/julia/share/julia/site/v0.7/FileWatching/test/runtests.jl:417
  Expression: pop!(changes) == ("$(F_PATH)$(i)" => FileWatching.FileEvent(FileWatching.UV_RENAME))
   Evaluated: "afile.txt" => FileWatching.FileEvent(false, true, false) == "afile.txt2" => FileWatching.FileEvent(true, false, false)
FileWatching: Test Failed at /private/tmp/julia/share/julia/site/v0.7/FileWatching/test/runtests.jl:417
  Expression: pop!(changes) == ("$(F_PATH)$(i)" => FileWatching.FileEvent(FileWatching.UV_RENAME))
   Evaluated: "afile.txt" => FileWatching.FileEvent(false, true, false) == "afile.txt1" => FileWatching.FileEvent(true, false, false)