Change test GW file to v2.0 (instead of v2.0.dev)

!118 (merged) has added support for GW file v2.0 in a development version, and some tests using files v2.0.dev.

Once LISA GW Response v2.0 has been released, we should change the test files to v2.0.

added test label

assigned to @j2b.bayle

changed milestone to %v1.2

created merge request !132 (merged) to address this issue

mentioned in merge request !132 (merged)

closed with merge request !132 (merged)

mentioned in commit f5e24e61