Adjust formatting of the trigger file path default value
for container, maven and PyPI release jobs. Drop the
parameter from release job docs to match the template,
and add a sentence with the regular expression.
Change-Id: Ibff31ac5c82fc1ed4f025fb4c16d9c907456f3c8 Signed-off-by: Lott, Christopher (cl778h) <cl778h@att.com>