created methdology for test data management

* storage of a test's name, json input, expected json output
created methdology for test data management - part2

* added ability to loop through multiple tests
  just append a new dictionary with test-information to the testDataList
added fake DB implemented as json file

* added check for function json output
  'def manage' gets userstring from 'def getObjectFromStorage'
  until now, 'def getObjectFromStorage' was simply creating a new user
  on-the-fly, which meant that 'manage' had to work with different user
  data than the originally created user