Fix examples tests
Follow up on #131 and !149 (merged).
Fixed, re-enabled and (locally) tested serial tests: straightwalk, randomwalk, hydro.
Please re-enable and fix remaining tests.
Follow up on #131 and !149 (merged).
Fixed, re-enabled and (locally) tested serial tests: straightwalk, randomwalk, hydro.
Please re-enable and fix remaining tests.