Automated testing of QPI functions in testnet

[philippwerner]

• add testing and interface for testing of untested QPI functions to contracts TestExampleA.h and TestExampleB.h
• important to test tick-related functions that cannot be tested in Google Test (yet), such as getting timestamp, number of ticks etc.
  • getting tick-related data should be tested in all system procedures and a user procedure that can be triggered optionally
  • data per tick is stored in an array, including the returned values and inconsistencies among different procedures if any
  • data can be queried via contract function
• implement qubic-cli command for automatic testing, comparing tick results returned by contract function and results returned by existing functions to query tick info
• important test case: first tick after loading auto-saved snapshot

This is a follow-up task of #283 for testing the implementation.