adding v2 of query converter

Makefile

aql/convertQuery.go

cypher/clustering.go

cypher/convertQuery_test.go

cypherv2/clustering.go

cypherv2/convertQuery.go

cypherv2/convertQuery_test.go

cypherv2/createConstraints.go

cypherv2/hierarchy.go

cypherv2/queryConverter.go

cypherv2/testing_queries/new_query.json

cypherv2/testing_queries/old_query.json

cypherv2/testing_queries/old_query_group.json

cypherv2/testing_queries/old_query_group_new.json

cypherv2/testing_queries/old_query_group_new2.json

cypherv2/testing_queries/old_query_new.json

entity/queryStruct.go

entityv2/example_queries/test_simple_query.json

entityv2/example_queries/test_simple_query2.json

entityv2/example_queries/test_simple_query_in.json