Updated git submodules

Project: aaa master 54d928a1c160e658294d4c512de4f38769bd67df

Use config-parent

This patch switches the relevant POMs to use config-parent instead of
re-specifying the appropriate Maven plugins. It also drops
yang-gen-{config,sal} from .gitignore since they are now in target.

Change-Id: I5d27111d7061cf02d55bad3173e299f289671df1
Signed-off-by: Stephen Kitt <skitt@redhat.com>

diff --git a/docs/submodules/aaa b/docs/submodules/aaa
index 5ca09fc139710f25c6d596f09c692350c09b868b..54d928a1c160e658294d4c512de4f38769bd67df 160000 (submodule)
--- a/docs/submodules/aaa
+++ b/docs/submodules/aaa
@@ -1 +1 @@
-Subproject commit 5ca09fc139710f25c6d596f09c692350c09b868b
+Subproject commit 54d928a1c160e658294d4c512de4f38769bd67df