add a user property to store configuration per user

[simonsymhoven]

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[codecov]

Codecov Report

Merging #14 (ea6f773) into master (e789cdf) will decrease coverage by 21.80%.
The diff coverage is 16.66%.

❗ Current head ea6f773 differs from pull request most recent head eea6e5c. Consider uploading reports for the commit eea6e5c to get more accurate results

@@              Coverage Diff              @@
##             master      #14       +/-   ##
=============================================
- Coverage     70.45%   48.64%   -21.81%     
- Complexity        4        5        +1     
=============================================
  Files             2        3        +1     
  Lines            44       74       +30     
  Branches          3        4        +1     
=============================================
+ Hits             31       36        +5     
- Misses           11       36       +25     
  Partials          2        2               

Impacted Files	Coverage Δ	Complexity Δ
...enkins/plugins/monitoring/MonitorUserProperty.java	16.66% <16.66%> (ø)	1.00 <1.00> (?)

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