Change thread names in the trace

[ndkoval]

Change the main thread name from "Thread 1" to "Main Thread" and enumerate user threads starting from 1.

Current output:

|--------------------------------|
| Thread 1 | Thread 2 | Thread 3 |
|--------------------------------|
|    ...   |    ...   |    ...   |
|--------------------------------|

Desired output:

|-----------------------------------|
| Main Thread | Thread 1 | Thread 2 |
|-----------------------------------|
|     ...     |    ...   |    ...   |
|-----------------------------------|

[eupp]

Don't we want to just print thread names, i.e., Thread.name ?
https://docs.oracle.com/javase/8/docs/api/java/lang/Thread.html#getName--

[ndkoval]

@eupp, this is a good suggestion. Should we then make the thread name consistent across runs?

[eupp]

Should we then make the thread name consistent across runs?

I believe with deterministic hash codes this problem should be solved, but we need to try and see.

[ndkoval]

@eupp we do not have deterministic hash codes for gpmc