Supressed makefile init error messages
Supressed makefile init error messages

Details:
- During init of the makefile, the test for py.test options
  and the pbr-based repo version check raise error messages
  (but work). This change suppresses the error messages.

Signed-off-by: Andreas Maier <38dbb04957d222ea6ce72de72413b1e55e665472@de.ibm.com>

zhmcclient/python-zhmcclient,zhmcclient/python-zhmcclient