Implement LDBC driver

[szarnyasg]

To allow proper validation with the LDBC BI workload, we'll need to implement an LDBC SNB driver, along the lines of the Neo4j driver implementation.

cc @hegyibalint

[szarnyasg]

We currently perform validation in the BiValidationTest class. Implementing an LDBC driver certainly would have its benefits, however, it cannot be used for benchmarking as it is.
The reason for this is that the LDBC driver is geared towards the Interactive workload and does not support incremental queries, i.e. it has no way of registering a query with its substitution parameters and executing it continuously. Hence, we are postponing this issue.