Tracing - respect tx boundary for EIP-2200 cost calculations #339
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When we calculate the cost of a SSTORE in trace we need to consider the
original value as of when the last transaction finished, not when the
whole block started.
To create a test for this the test blockchain also needed to be upgraded
to Istanbul. This resulted in a large number of cost only changes.
Signed-off-by: Danno Ferrin danno.ferrin@gmail.com