Update git submodules

* Update docs/submodules/msb/apigateway.git from branch 'master'
  to 0fb3a6a7ded2513ceed45196d9cb0f05f2466f8a
  - Merge "Release 1.2.6 docker"
  - Release 1.2.6 docker
    
    Issue-ID: MSB-463
    Signed-off-by: Huabing Zhao <zhao.huabing@zte.com.cn>
    Change-Id: I771f3e451936102f108da11914514418d5c9de80
    
1 file changed