Revert optimized version to use attribute for resolving monitoredBy.

models/railway-batch-1-ag-ref.json

models/railway-batch-2-ag-ref.json

models/railway-inject-1-ag-ref.json

models/railway-inject-2-ag-ref.json

models/railway-repair-1-ag-ref.json

models/railway-repair-2-ag-ref.json

...nbenchmark/generator/json4agref/Json4AgRefSerializer.java

...stadd-optimized-base/src/main/jastadd/TreeNavigation.jrag

...mized-base/src/main/jastadd/queries/RouteSensorMatch.jrag

...zed-base/src/main/jastadd/queries/SemaphoreNeighbors.jrag

...d-base/src/main/jastadd/queries/SwitchMonitoredMatch.jrag

...rk-tool-jastadd-optimized-base/src/main/jastadd/train.ast

.../inject/JastaddTransformationInjectConnectedSegments.java

...ns/inject/JastaddTransformationInjectSwitchMonitored.java

...ns/repair/JastaddTransformationRepairSwitchMonitored.java