E2E test launcher e2e-tests.sh is aimed to help us to deal with various E2E tests parameters.

nickboldt had proposed to improve it slightly:

• there's a much cleaner way to parse cmdline vars than all this sed stuff and ~= we're using in launcher. Here's an example that just grabs flags and their associated params:
  https://github.com/jbosstools/jbosstools-build-ci/blob/master/util/verifyTarget.sh#L85
  For -flag value (with a space instead of equals sign) it works very well.
• echo usage info & exit run w/o params as described here: https://github.com/jbosstools/jbosstools-build-ci/blob/master/util/checkLatestPublishedSHA.sh#L30