apparmor_parser --namespace-string does not load profiles in the specified ns in 2.10

AppArmor 2.10 contains a regression which causes profiles to not be loaded in a policy namespace even when the --namespace-string option is passed to apparmor_parser.

In 2.9.1:

$ echo "/t {}" | apparmor_parser -qSn mynamespace | strings
version
namespace
mynamespace
profile
flags
caps64
policydb
aadfa
notflex

In 2.10:

$ echo "/t {}" | apparmor_parser -qSn mynamespace | strings
version
profile
flags
caps64
policydb
aadfa
notflex

Note that the 2.10 binary policy output is missing the "namespace" and "mynamespace" fields.