datastore: Ensure all errors are handled upwards, logged or disregarded
datastore: Ensure all errors are handled upwards, logged or disregarded

This is part of a drive to getting towards a 100% on errcheck. Every
error should be either actively disregarded because it doesn't make
sense to handle (e.g. on an error path), logged or wrapped and past
up the calling stack.

Signed-off-by: Rob Bradford <c49e1dc14cd52e2644816db47123896e0ac79025@intel.com>

rbradford/ciao,ciao-project/ciao,01org/ciao,mcastelino/ciao,kaccardi/ciao,markdryan/ciao,mcastelino/ciao,mcastelino/ciao,kaccardi/ciao,tpepper/ciao,ciao-project/ciao,rbradford/ciao,01org/ciao,tpepper/ciao,markdryan/ciao,tpepper/ciao