Added conversion between the query frequency (i.e., number of updates per query) to query interleave times.
It is now possible to specify either of them (frequencies or interleaves) in the config files.
Additionally, introduced dependency on updateStream.properties file, where we get the average distance between updates, and use it to compute the interleave times
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Merge branch 'master' of https://github.com/ldbc/ldbc_driver