output validation result json files with UTF-8 encoding
set UTF-8 encoding to log4j console appender configuration
fix bug where GCT Check was not being performed for some operations
modify LDBC SNB so AddPerson no longer performs GCT Check
minor fixes in WorkloadStreams to remove unnecessary Milli->Nano->Milli conversions
fix bug in Client where wait for GCT to initialize was being done twice
Merge branch 'master' into short_reads