When start spdk_tgt with json config file, if the file cannot be read,
there is no error message indicating what is wrong.
Change-Id: I4e0cbad5fb7a23b99f05ebdce7d0801eebbd63f7
Signed-off-by: Rui Chang <rui.chang@arm.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/6042
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Community-CI: Mellanox Build Bot
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>