Update git submodules

Update git submodules

* Update docs/submodules/integration.git from branch 'master'
  to d74e5a6083efe5e8979987cb687c6428d5e490fc
  - ROP file creation script for e2e testing

    * Creates a number of files (set using NUM_FILES) with standard filenames
    * File are created using a template XML file (set using FILE_TEMPLATE)
    * Files are updated after a specific interval (set using UPDATE_MINS)
    * At each update, the name of oldest file is modified with current timestamp
    * Works for multiple PNF nodes (set using NUM_NODES)

    Change-Id: I279970720ae25a360bd7a56923ebf3b8825abfd8
    Issue-ID: DCAEGEN2-1225
    Signed-off-by: RehanRaza <muhammad.rehan.raza@est.tech>