Fix broken FlushAll

[zeripath]

Go contexting is not quite how you expect...

a := ["1", "2", "3"]
for _, i := range a {
   go func() {
      fmt.Println(i)
    } ()
}

will most likely print 3 3 3.

Our linter should have caught this as go vet would catch it

[codecov-io]

Codecov Report

Merging #10101 into master will decrease coverage by <.01%.
The diff coverage is 74.3%.

@@            Coverage Diff             @@
##           master   #10101      +/-   ##
==========================================
- Coverage   43.49%   43.49%   -0.01%     
==========================================
  Files         567      567              
  Lines       79104    79104              
==========================================
- Hits        34409    34403       -6     
- Misses      40447    40454       +7     
+ Partials     4248     4247       -1

Impacted Files	Coverage Δ
routers/repo/view.go	39.13% <100%> (-0.87%)	⬇️
modules/setting/cache.go	53.84% <58.82%> (ø)	⬆️
modules/git/commit_info.go	67.8% <63.63%> (ø)	⬆️
modules/cache/cache.go	31.5% <75%> (ø)	⬆️
modules/cache/last_commit.go	80% <80%> (ø)	⬆️
modules/references/references.go	80.32% <80.85%> (ø)	⬆️
models/unit.go	37.03% <0%> (-2.47%)	⬇️
services/pull/patch.go	66.03% <0%> (-1.89%)	⬇️
... and 5 more

---

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[lafriks]

This would be more correct imho

[zeripath]

Make lg-tm work