Script for running integtests in whichever repos the user specifies

[bieryAtFnal]

Description

In recent discussions about the running of integtests (regression tests and integration tests), people (including me) mentioned several requests for enhancements. Those included the following:

• providing "bundle" script functionality in all repos that have integtests without adding the maintenance burden of having to maintain N different scripts
• the ability to run test from repos that have not been cloned into a local software area

This changes covered by this PR attempt to meet that need. A global bundle script named dunedaq_integtest_bundle.sh has been created and a couple of utility scripts for finding repos with integtests and listing the integtests in a given repo are included.

A markdown document has been created in the docs subdirectory of this repo with an introduction to these new scripts. Please refer to that document for instructions on how to use the scripts.

Testing of these changes would include running various combinations of integtests using the dunedaq_integtest_bundle.sh script and specifying different command-line options to customize the behavior of the script.

To get access to these scripts before they are merged to the develop branch of daqsystemtest, users should include the kbiery/global_bundle_script branch of daqsystemtest in their local software area(s) and rebuild the software area to get the scripts copied into the appropriate bin areas.

Please note that some of the command-line options that were available in the older daqsystemtest_integtest_bundle.sh script have not been carried forward to the new global bundle script. For example, ones that specify the Nth thru Mth tests to be run. That functionality became less useful in the global bundle script since the list of tests to be run is much more dynamic with that script.

Type of change

• Documentation (non-breaking change that adds or improves the documentation)
• New feature or enhancement (non-breaking change which adds functionality)

Testing checklist

• Minimal system quicktest passes (pytest -s minimal_system_quick_test.py)
• Full set of integration tests pass (dunedaq_integtest_bundle.sh)

[eflumerf]

Works as advertised.

[jcfreeman2]

I've played around with this and I think it looks great. The only thing I'd suggest is to provide a link to the script-specific page from the main page (README.md).