PMM-7 Fix grafana stop/start

[ademidoff]

PMM-7

Link to the Feature Build: SUBMODULES-3773

• Links to related pull requests (optional).

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 43.53%. Comparing base (7d61381) to head (0276306).
Report is 1 commits behind head on v3.

Additional details and impacted files

@@            Coverage Diff             @@
##               v3    #3320      +/-   ##
==========================================
+ Coverage   43.51%   43.53%   +0.02%     
==========================================
  Files         366      366              
  Lines       44169    44169              
==========================================
+ Hits        19219    19231      +12     
+ Misses      23265    23252      -13     
- Partials     1685     1686       +1     

Flag	Coverage Δ
admin	11.51% <ø> (ø)
agent	51.96% <ø> (+0.12%)	⬆️
managed	45.24% <ø> (-0.01%)	⬇️
vmproxy	68.57% <ø> (ø)

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[BupycHuk]

we can't ensure that grafana stops, because pmm-managed might start it any moment. But it's good enough for now.

[ademidoff]

we can't ensure that grafana stops, because pmm-managed might start it any moment. But it's good enough for now.

Does pmm-managed launch grafana? I think it doesn't, it only generates grafana.ini config. Grafana's lifecycle is managed by supervisord only I believe.