Enhance assertions for received responses in e2e tests

[mustafauzunn]

Story Form

As a developer
I want to enhance the way we assert received responses
So that it is easier and more convenient to verify test scenarios

Technical Notes

Currently in e2e tests statuses are stored in the form of String. For that we have string literals with lower casing to verify the scenarios.
We get StreamStatus with statuses in the format of String. So we need to start enhancement from here downwards.
We can use a simple data structure for storing the statuses. Even we can add methods like hasAcknowledgement() for verification.