Update git submodules

* Update docs/submodules/externalapi/nbi.git from branch 'master'
  to ec4e090b083a58352271477c4df466d14d2c5e60
  - Merge "update swagger based on spectral scans"
  - update swagger based on spectral scans
    
    Issue-ID: EXTAPI-378
    Signed-off-by: aosull01 <adrian.osullivan@huawei.com>
    Change-Id: I3f9b27f67e19f25d92a1383a398a817ab51e8358
    
1 file changed