Merge pull request #2297 in SNORT/snort3 from ~OKHOMIAK/snort3:trace_print_instance_i...

Merge pull request #2297 in SNORT/snort3 from ~OKHOMIAK/snort3:trace_print_instance_id to master

Squashed commit of the following:

commit 83da91a0bf7dcc47eb2bcdde87860a240229f78b
Author: Oleksii Khomiakovskyi <okhomiak@cisco.com>
Date:   Tue Jun 30 18:43:12 2020 +0300

    main: set thread type for main thread

commit 00065f327ea2f5555fedc514f7ab2434e7e3086c
Author: Oleksii Khomiakovskyi <okhomiak@cisco.com>
Date:   Thu Jun 18 14:00:25 2020 +0300

    trace: add thread type and thread instance id to each log message for stdout logger