Avoid creating a new 'err' variable in the 'if'-branch, shadowing the one
in the outer scope.
Any error from subsequent 'cloud, err = GetCloudProvider()' was not propagated
to 'err' variable in the outer scope and thus errors were never returned from
this function.
This is hard to debug error on OpenStack, when content of --cloud-config=
file is wrong or connection to OpenStack fails. Such error is never logged
and Kubernetes thinks everything is OK.
f7384827b8