* fix reference tests in the CI, fix pre-Constantinople issue, make sure we verify reference test count in ci to avoid in future

Signed-off-by: daniellehrner <daniel.lehrner@consensys.net>

* addressed the pr comments

Signed-off-by: daniellehrner <daniel.lehrner@consensys.net>

* better error message

Signed-off-by: daniellehrner <daniel.lehrner@consensys.net>

* dynamic check for test count

Signed-off-by: daniellehrner <daniel.lehrner@consensys.net>

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Signed-off-by: daniellehrner <daniel.lehrner@consensys.net>