Issue #402 - add initial test cases
Issue #402 - add fixtures
Issue #402 - fix sessionId in tests
Issue #402 - fix tests
Merge branch 'develop' of https://github.com/ndomar/megasoft-14 into C3_silvermist_#69_reset_tangle
Issue #402 - delete transactions and messages
Issue #402 - add test functions
Issue #402 - fix conventions
Issue #402 - fix conflicts
Issue #402 - use LoadLeaveTangleData fixture
Issue #402 - remove LoadResetTangleData fixture
Merge pull request #520 from ndomar/C3_silvermist_#69_reset_tangle

S[69]: As a tangle owner, i can reset the tangle history and transactions