message: Check if merkle storage calculated hash agrees with passed ctx hash
diff: @@ -61,7 +61,8 @@ impl ContextApi for TezedgeContext {
  let mut merkle = self.merkle.write().expect("lock poisoning");
  let date: u64 = date.try_into()?;
  - merkle.commit(date, author, message)?;
  + let commit_hash = merkle.commit(date, author, message)?;
  + assert_eq!(&commit_hash, new_context_hash);
  // associate block and context_hash
  if let Err(e) = self.block_storage.assign_to_context(block_hash, new_context_hash) {
  