The recipeinc method returns the absolute path of the test_recipe.inc
file of a specified recipe. It replaces four instances of identical
code, and make it possible to access the filename from a testcase for
cleanup.
The write_recipeinc and append_recipeinc methods are changed to return
the path to the file in case that is useful.
The test_recipe.inc file is usually cleaned up in a finally block,
but that block executes before any teardown operations. This blocks
any teardown that requires the presence of the test_recipe.inc file.
Signed-off-by: Ola x Nilsson <olani@axis.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
