Log warning when setting could not be load.
Log warning when setting could not be load.

Failing to load a setting config should be a warning,
even if the policy is set to ignore.

Signed-off-by: Kevin Rocard <f6672397850e914591889d29dcaf9077eb1a8a4f@intel.com>

dawagner/parameter-framework,sdnnfv/parameter-framework,krocard/parameter-framework,01org/parameter-framework,wzairix/parameter-framework,miguelgaio/parameter-framework,clero/parameter-framework,wzairix/parameter-framework,mgaio/parameter-framework,wzairix/parameter-framework,miguelgaio/parameter-framework,sdnnfv/parameter-framework,mgaio/parameter-framework,dawagner/parameter-framework,clero/parameter-framework,dawagner/parameter-framework,miguelgaio/parameter-framework,clero/parameter-framework,soaresm/parameter-framework,soaresm/parameter-framework,sdnnfv/parameter-framework,mgaio/parameter-framework,01org/parameter-framework,krocard/parameter-framework,01org/parameter-framework,soaresm/parameter-framework,krocard/parameter-framework