Added another scenario to logger test job to test concurrent logging from multiple threads. Based on this, updated local logging to be a producer consumer model. Consumer is really aggressive though trying to flush as an when possible
Changed the local log files to be under folder named after the run,
instead of creating files with prefixes named after the run
Merge pull request #14 from NuGet/daravind/ConcurrentLocalLogging

Daravind/concurrent local logging