Stats handler

[stefanoborini]

Adds a singleton for Stats information that we will use in the admin interface

[codecov-io]

Codecov Report

Merging #406 into master will increase coverage by 0.08%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #406      +/-   ##
==========================================
+ Coverage   95.15%   95.23%   +0.08%     
==========================================
  Files          94       96       +2     
  Lines        4047     4095      +48     
  Branches      254      255       +1     
==========================================
+ Hits         3851     3900      +49     
  Misses        143      143              
+ Partials       53       52       -1

Impacted Files	Coverage Δ
remoteappmanager/admin_application.py	100% <ø> (ø)	⬆️
remoteappmanager/webapi/admin/__init__.py	100% <100%> (ø)	⬆️
remoteappmanager/webapi/admin/stats.py	100% <100%> (ø)
remoteappmanager/webapi/admin/tests/test_stats.py	100% <100%> (ø)
remoteappmanager/tests/webapi_test_case.py	93.33% <0%> (+2.22%)	⬆️

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