[Lokiexporter] Implementation ( PR 2/3 )

[gramidt]

Description:
The implementation of the Loki exporter.

Link to tracking Issue:
#1894

Testing:
Unit Tests

Documentation:
Godoc and README

[codecov]

Codecov Report

Merging #1952 (02d20b4) into master (ebd62bd) will increase coverage by 1.03%.
The diff coverage is 53.84%.

@@            Coverage Diff             @@
##           master    #1952      +/-   ##
==========================================
+ Coverage   89.15%   90.18%   +1.03%     
==========================================
  Files         393      396       +3     
  Lines       19329    19493     +164     
==========================================
+ Hits        17233    17580     +347     
+ Misses       1641     1448     -193     
- Partials      455      465      +10     

Flag	Coverage Δ
integration	69.79% <ø> (?)
unit	88.97% <53.84%> (-0.19%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
exporter/lokiexporter/loki.go	36.58% <34.21%> (-50.09%)	⬇️
exporter/lokiexporter/logdata_to_loki.go	50.00% <50.00%> (ø)
exporter/lokiexporter/config.go	73.91% <73.91%> (ø)
exporter/lokiexporter/factory.go	94.73% <100.00%> (-5.27%)	⬇️
internal/common/testing/container/container.go	73.68% <0.00%> (ø)
processor/groupbytraceprocessor/event.go	96.80% <0.00%> (+0.79%)	⬆️
receiver/prometheusexecreceiver/receiver.go	88.33% <0.00%> (+2.50%)	⬆️
receiver/jmxreceiver/receiver.go	94.80% <0.00%> (+16.88%)	⬆️
... and 7 more

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[github-actions]

This PR was marked stale due to lack of activity. It will be closed in 7 days.

[github-actions]

Closed as inactive. Feel free to reopen if this PR is still being worked on.

[pmm-sumo]

I think something might have gone off with auto-assigning the reviewers for this PR. Also, the community asks for this exporter. Perhaps it should be reopened @bogdandrutu @tigrannajaryan ?

[gramidt]

@pmm-sumo - Yeah, I plan on re-opening this PR very soon. I ended up having to refocus on other tasks the past two weeks, but will come back to this either this coming weekend or next week.

[tigrannajaryan]

Feel free to reopen. Not sure why it was not assigned to anyone. Was it a draft PR maybe?

[gramidt]

@tigrannajaryan - Yes, this was a draft PR that was still a WIP.

[gramidt]

@pmm-sumo - I also just responded in the Gitter channel letting Ferenc know I'll be finishing it in the near future. Thank you so much for bringing this to my attention!

[gramidt]

@tigrannajaryan - I'm having trouble re-opening this PR. Any chance you are able to re-open it with your permissions?

[tigrannajaryan]

@tigrannajaryan - I'm having trouble re-opening this PR. Any chance you are able to re-open it with your permissions?

@gramidt I can't either (not sure why). Please create a new PR.

[gramidt]

Thank you for trying, @tigrannajaryan! I will create a new PR.