Revert "Makes CollectDataToIORank::localIndexMap_ have nonzero size when accessing."

This reverts commit dde79daf4ec2004148a58250c4c8af5390251689.

Judging from ParallelDebugOutput.hh this should not be a map from element
index to interior element index, but an a list of indices of all interior
elements. Therefore we need to reserve and later on push_back.

ebos/collecttoiorank.hh

@@ -229,7 +229,7 @@ namespace Ewoms
 
                 localIndexMap_.clear();
                 const size_t gridSize = gridManager.grid().size( 0 );
-                localIndexMap_.resize( gridSize, -1 );
+                localIndexMap_.reserve( gridSize );
 
                 // store the local Cartesian index
                 IndexMapType distributedCartesianIndex;