fix MonitorTest.java for scm-api update and java language level 8

[simonsymhoven]

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[codecov]

Codecov Report

Merging #23 (a30ef6d) into master (4f1892e) will not change coverage.
The diff coverage is n/a.

❗ Current head a30ef6d differs from pull request most recent head 20d9720. Consider uploading reports for the commit 20d9720 to get more accurate results

@@            Coverage Diff            @@
##             master      #23   +/-   ##
=========================================
  Coverage     93.61%   93.61%           
  Complexity        5        5           
=========================================
  Files             2        2           
  Lines            47       47           
  Branches          3        3           
=========================================
  Hits             44       44           
  Misses            2        2           
  Partials          1        1           

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