Expand fuzz testing to new operations and features

[ionut-arm]

The fuzz testing framework works by picking up an initial corpus and performing more and more modifications on it while checking what happens to the service when those requests are processed. The initial fuzzing framework was written to generate an initial corpus consisting of a select list of operation which were available at the time. Since then, however, more operations and features have been added and thus the corpus generation should be updated to cover them as well.

Any other features that could potentially be exploited (such as the admin functionality) should be investigated and included.