Add possibility to decide reporting for metrics

[masokol]

Closes #390

[codecov-commenter]

Codecov Report

Merging #394 (4be6466) into master (5be5749) will decrease coverage by 0.19%.
The diff coverage is 64.91%.

@@             Coverage Diff              @@
##             master     #394      +/-   ##
============================================
- Coverage     77.07%   76.88%   -0.20%     
+ Complexity     1253     1252       -1     
============================================
  Files           130      130              
  Lines          5440     5481      +41     
  Branches        552      559       +7     
============================================
+ Hits           4193     4214      +21     
- Misses         1070     1081      +11     
- Partials        177      186       +9     

Impacted Files	Coverage Δ
...ndra/ecchronos/application/ECChronosInternals.java	0.00% <0.00%> (ø)
...ecchronos/application/spring/BeanConfigurator.java	51.76% <50.00%> (-0.62%)	⬇️
...ecchronos/core/metrics/TableRepairMetricsImpl.java	69.87% <60.71%> (-10.13%)	⬇️
...cassandra/ecchronos/application/config/Config.java	94.04% <76.00%> (-2.15%)	⬇️

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