Bump mapStructVersion from 1.5.5.Final to 1.6.3

Bump mapStructVersion from 1.5.5.Final to 1.6.3

Bumps `mapStructVersion` from 1.5.5.Final to 1.6.3.

Updates `org.mapstruct:mapstruct` from 1.5.5.Final to 1.6.3
- [Release notes](https://github.com/mapstruct/mapstruct/releases)
- [Commits](https://github.com/mapstruct/mapstruct/compare/1.5.5.Final...1.6.3)

Updates `org.mapstruct:mapstruct-processor` from 1.5.5.Final to 1.6.3
- [Release notes](https://github.com/mapstruct/mapstruct/releases)
- [Commits](https://github.com/mapstruct/mapstruct/compare/1.5.5.Final...1.6.3)

updated-dependencies:
- dependency-name: org.mapstruct:mapstruct
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.mapstruct:mapstruct-processor
  dependency-type: direct:production
  update-type: version-update:semver-minor

Issue-ID: CIMAN-33

Change-Id: Ide09adee59bd71295dd4dabdd5828d07a31886db
Signed-off-by: dependabot[bot] <support@github.com>
Signed-off-by: onap.gh2gerrit <releng+onap-gh2gerrit@linuxfoundation.org>