Update git submodules

* Update kubernetes/aai from branch 'master'
  to 81954e51ef4c04fb08182d779f4871dfca766221
  - Update schema service to use v17 to v19
    
    Issue-ID: AAI-2607
    Change-Id: Ia49109e37af5092a5394d69a69dd9ad0fb14e2d7
    Signed-off-by: Kajur, Harish (vk250x) <vk250x@att.com>
    
diff --git a/kubernetes/aai b/kubernetes/aai
index 1a2274d..81954e5 160000
--- a/kubernetes/aai
+++ b/kubernetes/aai
@@ -1 +1 @@
-Subproject commit 1a2274dc0d8089b12a4b6feff328153dd9b26215
+Subproject commit 81954e51ef4c04fb08182d779f4871dfca766221