Update git submodules

* Update docs/submodules/externalapi/nbi.git from branch 'master'
  to 6f30b121428daa3cc116471feb90403bf504f43d
  - release 6.0.3 docker for free_radius gating test
    
    Issue-ID: EXTAPI-434
    
    Signed-off-by: aosull01 <adrian.osullivan@huawei.com>
    Change-Id: Ieb2af4e6394423b45bc776ffe5990caae8f5d0ea
    
1 file changed