Fix/reminder default scheduling time

[jungwire]

Negotiator pull request:

Description:

Changes the default schedule of the reminder emails from every night to Monday midnight

Checklist:

Make sure you tick all the boxes bellow if they are true or do not apply:

• I have performed a self review of my code
• My code follows Google Java Code style
• I have made my code as simple as possible
• I have added unit tests and the code coverage has not decreased
• I have updated the documentation in all relevant places

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.71%. Comparing base (c760e7a) to head (7a61f85).

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #320   +/-   ##
=========================================
  Coverage     79.71%   79.71%           
  Complexity     1076     1076           
=========================================
  Files           146      146           
  Lines          3243     3243           
  Branches        173      173           
=========================================
  Hits           2585     2585           
  Misses          543      543           
  Partials        115      115           

Flag	Coverage Δ
unit	79.71% <ø> (ø)

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