ApplicationTest : Increase pause before checking process name (2nd attempt)

[ivanimanishi]

This ensures the process has had time to change its own name.

This is part of the effort to get the gaffer tests to pass inside IE's environment.
1s wasn't enough of a pause to guarantee that the gaffer process had had time to startup, import the Gaffer module, and then rename the process, before the test would check for the name. That's likely related to the use of non-local storage and loading extra startups.

2s does seem to be enough, but I added an extra second for safety.

Checklist

• I have read the contribution guidelines.
• I have updated the documentation, if applicable.
• I have tested my change(s) in the test suite, and added new test cases where necessary.
• My code follows the Gaffer project's prevailing coding style and conventions.

[ivanimanishi]

@johnhaddon , other than resolving the conflict with the Changes file, I think this PR should be ok.
I initially targeted main, and I think that messed up the Version Check somehow.
But let me know if you think I need to address that, and how.