Update git submodules

Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - Update OVP home page text

    JIRA: DOVETAIL-582

    We received new text from OPNFV marketing for the home page of the OVP web portal. Text title and body are pasted below.

    OPNFV is offering an OPNFV Verified Program (OVP) that verifies products and services with the "OPNFV Verified" mark.

    The OPNFV Verified program demonstrates the readiness and availability of commercial products based on OPNFV. Verified products and services submitted by vendors and service providers become compliant by implementing explicitly defined interfaces, behaviors and key features while retaining distinct and value-added innovations across features and capabilities.
    Navigate through the links in the left-hand menu to learn more and get started. You'll find step-step-instructions as well as a participation form. Use this portal to upload your test results when ready. Please send any questions to verified@opnfv.org.

    Change-Id: I5f6dd67fc187d7557a0b4cce6dd7391479e66b2b
    Signed-off-by: chenjiankun <chenjiankun1@huawei.com>