Update git submodules

* Update docs/submodules/integration.git from branch 'master'
  to d30ccf88968750e408ad130f5e2ed7c2ea2ef4aa
  - Add BBS use case dev guide to integration

    Add BBS use case details and dev guide to integration section in readthedocs

    Issue-ID: DOC-448
    Signed-off-by: Pérez Caparrós David, INI-INO-ECO-HCT <David.PerezCaparros@swisscom.com>
    Change-Id: I9fc7923842388e4941f4e53433d2f8cb6134caa9

diff --git a/docs/submodules/integration.git b/docs/submodules/integration.git
index 8efc17e..d30ccf8 160000 (submodule)
--- a/docs/submodules/integration.git
+++ b/docs/submodules/integration.git
@@ -1 +1 @@
-Subproject commit 8efc17e44176a2b60c00f321c5bf62e4f0ef5b46
+Subproject commit d30ccf88968750e408ad130f5e2ed7c2ea2ef4aa