Update git submodules

* Update docs/submodules/integration/test from branch 'master'
  to 8b8c573c4688be682727d3264ad37ee5ff556754
  - pcepuser update

    On Oxygen there is new session-state output
    Reworked Test Cases to compare more specific output

    Change-Id: Id55de439a3d8ae657325bc02fcd0bdf4ab7c415e
    Signed-off-by: Tomas Markovic <tomas.markovic@pantheon.tech>

diff --git a/docs/submodules/integration/test b/docs/submodules/integration/test
index abdf8e95fc1881db5ec164183b8a74cc738fa096..8b8c573c4688be682727d3264ad37ee5ff556754 160000 (submodule)
--- a/docs/submodules/integration/test
+++ b/docs/submodules/integration/test
@@ -1 +1 @@
-Subproject commit abdf8e95fc1881db5ec164183b8a74cc738fa096
+Subproject commit 8b8c573c4688be682727d3264ad37ee5ff556754