Update git submodules

* Update docs/submodules/integration/test from branch 'master'
  to 6b6d660d0fc8ea6f578ae1906c354e944612a9e4
  - Throughpcep test refactor

    Stop_pcc_mock with BGPcliKeywords
    add workers argument without math.
    Adjust topology_postcondition timeout.

    Change-Id: I15c05fc40488effa8e85b8d37b243cefc7312dbe
    Signed-off-by: Tomas Markovic <tomas.markovic@pantheon.tech>

diff --git a/docs/submodules/integration/test b/docs/submodules/integration/test
index c80fd7a955441db143d530931c8798107fa4147e..6b6d660d0fc8ea6f578ae1906c354e944612a9e4 160000 (submodule)
--- a/docs/submodules/integration/test
+++ b/docs/submodules/integration/test
@@ -1 +1 @@
-Subproject commit c80fd7a955441db143d530931c8798107fa4147e
+Subproject commit 6b6d660d0fc8ea6f578ae1906c354e944612a9e4