Modify log level of messages according to:

FATAL	application need to die
ERROR	general error which is wrong input values or just a general failure
WARNING	nothing big happened, but application might work better if warning is handled (update OFED, tune parameters, ...)
INFO	as library there should be nothing we have to say to use/application (maybe just 'hello, I`m libXYZ, version 1.2.3')
DEBUG	control path logging
TRACE	fast path logging