openjdk-8: use openjdk-common
openjdk-8: use openjdk-common

As openjdk-common.inc now serves all OpenJDK version let
openjdk-8-common require it. Furthermore remove the now duplicated
lines.

Signed-off-by: Richard Leitner <0f2fdd4d2dfbb4dde6236fd550af0a2071b34781@skidata.com>

rehsack/meta-java,rehsack/meta-java,rehsack/meta-java,rehsack/meta-java,rehsack/meta-java