Add test: Log entry agreement for network partition 2

[suhasks123]

Overview:

This should be implemented after issue #38 has been completed.

This is an extension to Log entry agreement for network partition 1, where the leader that is about to be partitioned has diverged from the main system in terms of the log entries.

Procedure:

• Simulate a situation where a network partition has happened for the leader, after which it adds new log entries and the remaining nodes have selected a new leader.
• Add new log entries to the system with the new leader which will be committed because of the majority.
• This means that the log entries have diverged.
• Reconnect the former leader back into the system and wait for the log entries to be synchronized.
• Then check if all replicas agree on the new log entries added after the network partition of the former leader.