Streamlines : Avoid load of a single step

If only one time step is loaded, all other logic must be able to handle this situation. Load data for all time steps when asking for flow related data
Use absolute value when comparing flow values

ApplicationLibCode/ProjectDataModel/Streamlines/RimStreamlineDataAccess.cpp

@@ -97,8 +97,9 @@ cvf::ref<RigResultAccessor> RimStreamlineDataAccess::getDataAccessor( cvf::Struc
 
     RigEclipseResultAddress address( RiaDefines::ResultCatType::DYNAMIC_NATIVE, resultname );
 
-    // Make sure we have the data we need loaded for the given phase and time step index
-    data->ensureKnownResultLoadedForTimeStep( address, timeIdx );
+    // Make sure we have the data loaded.
+    // NB, will trigger load of data for all time steps
+    data->ensureKnownResultLoaded( address );
 
     return RigResultAccessorFactory::createFromResultAddress( m_data, gridIdx, porModel, timeIdx, address );
 }

ApplicationLibCode/ProjectDataModel/Streamlines/RimStreamlineGenerator2.cpp

@@ -55,7 +55,7 @@ void RimStreamlineGenerator2::generateTracer( RigCell                    cell,
     for ( auto faceIdx : m_allFaces )
     {
         double flowVelocity = m_dataAccess->combinedFaceValueByArea( cell, faceIdx, m_phases, dominantPhase ) * direction;
-        if ( flowVelocity > m_flowThreshold )
+        if ( std::abs( flowVelocity ) > m_flowThreshold )
         {
             m_seeds.push_back( std::make_pair( cellIdx, faceIdx ) );
         }