Skip Fully connected network integration test and enable Disconnected network test - Closes#1031

[ishantiw]

What was the problem?

Fully connected network network tests are hanging up and not finished due to missing concrete Peer objects. Also, Disconnected network is passing so we need to unskip it.

How did I fix it?

Skip Fully connected network and unskip Disconnected network

How to test it?

npm t

Review checklist

• The PR resolves #1031
• All new code is covered with unit tests
• All new code was formatted with Prettier
• Linting passes
• Tests pass
• Commit messages follow the commit guidelines
• Documentation has been added/updated