Update git submodules

* Update docs/submodules/ccsdk/cds.git from branch 'elalto'
  to 03c7a8ddc3049f1b79b40ec96913eaaf8a539ef2
  - Rolling upgrade support for in-flight requests

    Three entry points are being handled :
     1 - REST endpoint
     2 - gRPC endpoint
     3 - Kafka consumer

    We make use of Phaser object to make sure the PreDestroy callback wait
    for all requests to be executed before stopping the process.

    The docker image was also modified to make sure the java process becomes
    PID 1 in the container in order to catch the SIGTERM signal which
    triggers the PreDestroy callback of Spring. This was done by using
    the "exec" command in bash.

    Issue-ID: CCSDK-1885
    Signed-off-by: Sebastien Premont-Tendland <sebastien.premont@bell.ca>
    Change-Id: I64611e569ddb78499aed2375e6186f028d1d8fa0

diff --git a/docs/submodules/ccsdk/cds.git b/docs/submodules/ccsdk/cds.git
index 558ac2c..03c7a8d 160000 (submodule)
--- a/docs/submodules/ccsdk/cds.git
+++ b/docs/submodules/ccsdk/cds.git
@@ -1 +1 @@
-Subproject commit 558ac2c252f5d22ff74b4f963ba1f23b26dcd248
+Subproject commit 03c7a8ddc3049f1b79b40ec96913eaaf8a539ef2