Make the deactivated tests run

[ezienecker]

Enhancement description

When I implemented https://github.com/iotaledger/iota-java/issues/174 I noticed that some tests didn't work.

I Disabled these tests. Make sure to check what is the right behavior and fix the code and/or the tests.

Version

Which version of the library are you running?

• Version:

1.0.0-beta9

Steps To reproduce the bug

Explain how the maintainer can reproduce the bug.

1. Search for the annotation @Disabled
2. Remove annotation
3. Run tests

Expected behaviour

Tests must run successfully

Actual behaviour

Tests are disabled