Added apmgoredisv8 module

[idealism-xxm]

Add support for go-redis/redis/v8

[cla-checker-service]

💚 CLA has been signed

[axw]

Looks good overall, thanks! Just a couple of things I'd like simplified.

Please sign the CLA: https://www.elastic.co/contributor-agreement. We can't accept any contributions without it.

[apmmachine]

💚 Build Succeeded

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Build stats

• Build Cause: [axw commented: jenkins run the tests please]

• Start Time: 2020-06-04T06:02:04.732+0000

• Duration: 26 min 10 sec

Test stats 🧪

Test	Results
Failed	0
Passed	7261
Skipped	182
Total	7443

[idealism-xxm]

@axw All issues are fixed now. Please review it and let me know if I've missed anything.

[axw]

Looks great, thanks for the updates! I'll just need to let CI run it through before merging.

I noticed that goredis/v8 hasn't had a 8.0.0 release yet – 8.0.0-beta2 is the most recent. Given that, I think we would consider this module experimental for now, meaning that the module's API might change in backwards-incompatible ways until goredis 8.0.0 is released.

[axw]

jenkins run the tests please

[codecov-commenter]

Codecov Report

Merging #780 into master will increase coverage by 0.09%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #780      +/-   ##
==========================================
+ Coverage   84.72%   84.81%   +0.09%     
==========================================
  Files         127      128       +1     
  Lines        8391     8417      +26     
==========================================
+ Hits         7109     7139      +30     
+ Misses        898      894       -4     
  Partials      384      384              

Impacted Files	Coverage Δ
module/apmgoredisv8/hook.go	100.00% <100.00%> (ø)
profiling.go	78.12% <0.00%> (+6.25%)	⬆️

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