Update git submodules

Update git submodules

* Update docs/submodules/policy/engine.git from branch 'master'
  to f4ec47c009cdc385a7efed02dda5d26f2ec31b57
  - JUnit/SONAR/Checkstyle in ONAP-REST

    First batch of JPA pojos Lombok'd and some missing coverage updated

    I'll be interested to see how Lomboking code shows up in SONAR, I have
    not added much JUnit here but I have reduced a good bit of source code,
    let's see what happens.

    Issue-ID: POLICY-2131
    Change-Id: I8f270ef57282f63821c1eb94dd6b50f8ae541028
    Signed-off-by: liamfallon <liam.fallon@est.tech>