The load() call from PyYaml is considered a higher security risk in that
it uses the FullLoader. safe_loade() is considered more safe by using
the SafeLoader instead.
Since the 5.1 release of PyYaml added warning output when using load(),
this switches over to safe_load() to avoid the unnecessary noise.
Change-Id: I1949deed094822d2c2c56659eadb1fc5ea6a59e5
Signed-off-by: Sean McGinnis <sean.mcginnis@gmail.com>