Docqueries fix

[cvvergara]

Fixes docqueries.

Some docqueries mark an error where they should not

• [x] aStar
• [x] bdAstar
• [x] linegraph

This one will be fixed by GSoC student docqueries/driving_distance/dijksraDD-issue729.result

In the following the ERROR is expected docqueries/topologicalSort/doc-topologicalSort.result docqueries/topology/createVertTab-any.result docqueries/topology/doc-pgr_analyzeGraph.result docqueries/topology/doc-pgr_createTopology.result docqueries/topology/doc-pgr_createVerticesTable.result docqueries/spanningTree/doc-pgr_randomSpanTree.result

@pgRouting/admins