Update git submodules

* Update docs/submodules/externalapi/nbi.git from branch 'master'
  to 86f0fd6ce609d5cf496ce4bb22656fb1ceb43c54
  - Update SO POST API for serviceInstances
    
    Issue-ID: EXTAPI-431
    
    Signed-off-by: aosull01 <adrian.osullivan@huawei.com>
    Change-Id: Ieadbfb3ff3bc15664b7526c3ee8e8d628d6af4d7
    
1 file changed