docs/devel: Explain how acceptance tests can be skipped

Documented under the "Acceptance tests using the Avocado Framework"
section in testing.rst how environment variables are used to skip tests.

Signed-off-by: Wainer dos Santos Moschetta <wainersm@redhat.com>
Message-Id: <20210115210022.417996-1-wainersm@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
1 file changed