Bump karaf.version from 2.2.11 to 4.2.7 in /parent

Bumps `karaf.version` from 2.2.11 to 4.2.7.

Updates `karaf` from 2.2.11 to 4.2.7

Updates `apache-karaf` from 2.2.11 to 4.2.7

Signed-off-by: dependabot[bot] <support@github.com>
1 file changed