Update git submodules

* Update docs/submodules/sdc/sdc-distribution-client.git from branch 'master'
  to 59d971d7b0095bbf07e079f84ec36caeb44735a3
  - Increasing code quality

    - Removal of commons-codecs
    - Additional code coverage

    Change-Id: Ib004cc3c893ea3b22f2f929e4fd211e83b203532
    Issue-ID: SDC-2326
    Signed-off-by: Tomasz Golabek <tomasz.golabek@nokia.com>

diff --git a/docs/submodules/sdc/sdc-distribution-client.git b/docs/submodules/sdc/sdc-distribution-client.git
index a6906f0..59d971d 160000 (submodule)
--- a/docs/submodules/sdc/sdc-distribution-client.git
+++ b/docs/submodules/sdc/sdc-distribution-client.git
@@ -1 +1 @@
-Subproject commit a6906f05493e09a0a0787ac5dbd3066407b13827
+Subproject commit 59d971d7b0095bbf07e079f84ec36caeb44735a3