Update git submodules

Update git submodules

* Update docs/submodules/ccsdk/features.git from branch 'master'
  to 18968b1198b81399b6d1d6ea695b87de8189a6c6
  - Merge "Inclusion of A1 adapter in SDNR meta karaf feature"
  - Inclusion of A1 adapter in SDNR meta karaf feature

    The feature to be included after successful merge of A1
    adapter feature JAR files and updated POM file in CCSDK
    distribution. Also included additional payload logs in
    provider code

    Issue-ID: CCSDK-1895
    Signed-off-by: SandeepLinux <Sandeep.Shah@ibm.com>
    Change-Id: I4818d5330cb670ae54166c470126d29c39c7b573