Issue #371 - adding wrong tangle id test case
Issue #371 - adding null session id test case
Issue #371 - adding expired session id test case
Issue #371 - adding wrong session id test case
Issue #371 - adding user not in tangle test case
Issue #371 - adding user left tangle test case
Issue #371 - adding tangleOwner test case
Issue #371 - adding part of tangleMember test case