Task 1: Merge Get delta between 2 anchors with grouping enabled test

Task 1: Merge Get delta between 2 anchors with grouping enabled test

- Remove @Ignore from the first Delta Report performance test
(Get delta between 2 anchors with grouping enabled) to verify if
the Jenkins build remains stable or fails due to this test.

Purpose:
This change is part of an investigation to identify which Delta Report
performance test is causing the build failures.

Issue-ID: CPS-3031
Change-Id: I96588ab0d16548775b23a513a1d1872d7a5ed671
Signed-off-by: Arpit Singh <AS00745003@techmahindra.com>