Update git submodules

* Update docs/submodules/msb/apigateway.git from branch 'master'
  to 4b2a245470e75932931cb47f97e2835ed7cd5778
  - Solve nexus-iq security issue: remove spring-core dependency
    
    Issue-ID: MSB-329
    Change-Id: I9be5f9808e24419d7f1f8137145a74142a07c400
    Signed-off-by: Huabing Zhao <zhaohuabing@gmail.com>
    
1 file changed