Add Authentification Database option when connect to mongo

[etiennecoutaud]

I would like to be able to reproduce behaviour similar to mongo client flag : --authenticationDatabase

Associated mongo client documentation : https://docs.mongodb.com/manual/reference/program/mongo/#cmdoption-mongo-authenticationdatabase

If not setting, default will be an empty string and behaviour will be similar to the actual. Mongo will use the same database that defined in the connection string.

[it-percona]

All committers have signed the CLA.

[idexter]

@etiennecoutaud Hi, thanks for the contribution.
Please run go test . -update then commit changed .golden file. It will fix tests and I'll merge it.

[etiennecoutaud]

@dexterHD thanks for your reply,

go test . -update are green

I thinks its related to a newline, I rerun the tests

[codecov]

Codecov Report

Merging #139 into master will increase coverage by 0.07%.
The diff coverage is 50%.

@@            Coverage Diff            @@
##           master    #139      +/-   ##
=========================================
+ Coverage     8.8%   8.87%   +0.07%     
=========================================
  Files          36      36              
  Lines        2193    2197       +4     
=========================================
+ Hits          193     195       +2     
- Misses       1981    1983       +2     
  Partials       19      19

Impacted Files	Coverage Δ
mongodb_exporter.go	28.57% <0%> (-0.94%)	⬇️
collector/mongodb_collector.go	64.78% <100%> (+0.16%)	⬆️
shared/connection.go	28.05% <100%> (+0.52%)	⬆️

---

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[codecov]

Codecov Report

Merging #139 into master will increase coverage by 0.07%.
The diff coverage is 50%.

@@            Coverage Diff            @@
##           master    #139      +/-   ##
=========================================
+ Coverage     8.8%   8.87%   +0.07%     
=========================================
  Files          36      36              
  Lines        2193    2197       +4     
=========================================
+ Hits          193     195       +2     
- Misses       1981    1983       +2     
  Partials       19      19

Impacted Files	Coverage Δ
mongodb_exporter.go	28.57% <0%> (-0.94%)	⬇️
collector/mongodb_collector.go	64.78% <100%> (+0.16%)	⬆️
shared/connection.go	28.05% <100%> (+0.52%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 45b9aa5...329743e. Read the comment docs.

[etiennecoutaud]

Thanks @dexterHD for the merge, any idea of when is the next release ?