add update3 api implementation
add api implementations for updates 4, 5, 6, and 7, and update tests accordingly (still more testing could be added)
fix bug in TestGraph where language for posts was a String[] instead of String
Merge branch '2.0-maint' into 2.1-maint
add update 1 and 8 cypher implementations
implement all update queries in cypher
update sample .csv and params file and add sample updatestream files
extend ldbc query2 tests to also cover some ldbc updates
rewrite ldbc query3 cypher implementation, to hopefully make it faster
added update related checks to ldbc query3 tests
add integration tests for running update workload using cypher connector
add integration tests for api implementation of updates
fix several bugs that were uncovered in importer - ID property was not written for Tags or Organisations
add deadlock detection error handling for api implementations of ldbc updates
Merge branch '2.0-maint' into 2.1-maint