Update git submodules

* Update docs/submodules/integration.git from branch 'elalto'
  to 99b4935ca9d69a0a9ecae65135d33b132bc38417
  - Integration doc for 5g pnp pnf use case
    
    Issue-ID: INT-1333
    
    Signed-off-by: krzysztof kuzmicki <krzysztof.kuzmicki@nokia.com>
    Change-Id: Iaeac6337bd37a2b2e5e66b0a400c4f67d8fd7d85
    
1 file changed