Update git submodules

* Update docs/submodules/ccsdk/distribution.git from branch 'master'
  to b594a9b61a49ccb3a53be0807fb090da3f606517
  - Merge "Update ansible-server to support playbook of PNF"
  - Update ansible-server to support playbook of PNF

    Use pnf-flag to distinguish PNF and VNF, and use different processing methods respectively.

    Change-Id: I5de015eb9044b8d66781e1f7bb12f9487e313125
    Issue-ID: APPC-1577
    Signed-off-by: Enbo Wang <wangenbo@huawei.com>

diff --git a/docs/submodules/ccsdk/distribution.git b/docs/submodules/ccsdk/distribution.git
index b11d58d..b594a9b 160000 (submodule)
--- a/docs/submodules/ccsdk/distribution.git
+++ b/docs/submodules/ccsdk/distribution.git
@@ -1 +1 @@
-Subproject commit b11d58dcac29a29aeb639a8be2f55408e3f06587
+Subproject commit b594a9b61a49ccb3a53be0807fb090da3f606517