Update git submodules

* Update docs/submodules/externalapi/nbi.git from branch 'master'
  to f4bcabffd0e4caae0f1f8834c0d9b5082c18837e
  - Update service catalog swagger as per suggested guidelines.
    
    Issue-ID: EXTAPI-374
    Signed-off-by: aosull01 <adrian.osullivan@huawei.com>
    Change-Id: I9633cf2dab7f312e67b022937f55da7f7b03071f
    
diff --git a/docs/submodules/externalapi/nbi.git b/docs/submodules/externalapi/nbi.git
index 9040e0f..f4bcabf 160000
--- a/docs/submodules/externalapi/nbi.git
+++ b/docs/submodules/externalapi/nbi.git
@@ -1 +1 @@
-Subproject commit 9040e0f71c3794bd1b56e2569f95795311ba0cc6
+Subproject commit f4bcabffd0e4caae0f1f8834c0d9b5082c18837e