[bugfix] Make tracerConcentrations_ valid for non-restart writes.

We decide whether to write tracer concentrations based on the size
of the tracerConcentrations_ container. Hence we need to make sure
that its size is zero after the concentrations have been written
and now resize the container to reflect that.

Before this change only the container inside tracerConcentrations_
were moved (and hence made empty) and next tiem we passed empty
containers to the output writing functions (which in parallel
triggered an assertion).

ebos/eclgenericoutputblackoilmodule.cc

@@ -670,6 +670,11 @@ assignToSolution(data::Solution& sol)
             std::string tmp = tracer.name + "F";
             sol.insert(tmp, UnitSystem::measure::identity, std::move(tracerConcentrations_[tracerIdx++]), data::TargetType::RESTART_SOLUTION);
         }
+        // We need put tracerConcentrations into a valid state.
+        // Otherwise next time we end up here outside of a restart write we will
+        // move invalidated data above (as it was moved away before and never
+        // reallocated)
+        tracerConcentrations_.resize(0);
     }
 }