Remove some traces inside ParameterMgr
Remove some traces inside ParameterMgr

Traces should be kept to minimum in query type methods as may result in
overwhelming outputs on the console, possibly hiding more important stuff.

Signed-off-by: Patrick Benavoli <3a927494dd8fd4dfe8fa256992840dc4ba515be1@intel.com>

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