Multi thread issue fix

[susrisha]

• Fixes the issue with multi threaded approach
• There is an inherent issue in the Library where the files are extracted to the same folder everytime.
• This is fixed by using 1 concurrent message at a time and processing it
• Also removed creation of a separate thread each time. The messages are received in a threadpool execution manner and need not be handled by a separate thread each time.

Testing

• This is tested with a sample topic and a sample message is run 10 times and 15 times in two consecutive sessions. Both times, it was able to execute and respond with all the required parameters and details.