Update git submodules

Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to d3f349b01202b3cbd7219d1232949979e9e3fca5
  - Merge "PNF ingestion in SO catalogdb"
  - PNF ingestion in SO catalogdb

    Support PNF csar ingestion in SO catalogdb
    Add integation test for TOSCA installer
    Fix the VNF resource/resource customization insert
    https://jira.onap.org/browse/SO-1604
    subtask so-1607 and SO-1608 are included
    The catalogdb table contents are attached in the jira

    Issue-ID: SO-1604
    Change-Id: Ie08c4a1219a6cce96ba081b0dd9d3e5fd997da8f
    Signed-off-by: eeginux <henry.xie@est.tech>