Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 7995ef475cc8b064b94d9ba54df4dbd8e15645d0
  - Fix issues in so-cloudify-client

    Annotate the "CloudifyClientConnector" interface with the @FunctionalInterface annotation
    Make this field final
    Either log or rethrow this exception
    Make "response" transient or serializable

    Issue-ID: SO-1841
    Change-Id: I13fa6b911d8789aed26fd27da23318f6dbca3760
    Signed-off-by: Parshad Patel <pars.patel@samsung.com>

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index 687cdac..7995ef4 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit 687cdacb9fd74629e94ebc0914ba8c72bb5015a5
+Subproject commit 7995ef475cc8b064b94d9ba54df4dbd8e15645d0