Update git submodules

* Update docs/submodules/escalator from branch 'master'
  - Added a license metadata line to specify Apache-2

    Change-Id: If4ac88ac7110d0bf25737ab5280be19522e78cb5
    Signed-off-by: rpaik <rpaik@linuxfoundation.org>

diff --git a/docs/submodules/escalator b/docs/submodules/escalator
index ff1d0d4..96c35cd 160000 (submodule)
--- a/docs/submodules/escalator
+++ b/docs/submodules/escalator
@@ -1 +1 @@
-Subproject commit ff1d0d4fd4a41fd24461bfa037abe9b7733674c5
+Subproject commit 96c35cdeba27d2e290cb9bd254b3871452ea6232