Valgrind revealed a mem leak when specifying the dhchap host key
through the config JSON file. This was because additional memory
was allocated while assigning the dhchap host key through strdup
calls via both nvme_ctrl_set_dhchap_host_key() and
nvme_get_ctrl_attr(), but only one of them was freed. Fix the same.

Signed-off-by: Martin George <marting@netapp.com>

Valgrind revealed mem leaks when specifying the dhchap ctrl key
through both the config JSON file and the CLI. This was because
additional memory was allocated while assigning the dhchap ctrl
key through strdup calls via both nvme_ctrl_set_dhchap_key() and
nvme_get_ctrl_attr(), but only one of them was freed. Fix the same.

Signed-off-by: Martin George <marting@netapp.com>

Valgrind revealed a mem leak when specifying the tls key through
both the config JSON file and the CLI. This was because memory
allocated through strdup via the nvme_get_ctrl_attr() while
fetching the tls key was not getting freed. Fix it.

Signed-off-by: Martin George <marting@netapp.com>