test: run sinttest only on Java 9 or higher
test: run sinttest only on Java 9 or higher

Until SMACK-651 is fixed.

akrherz/Openfire,akrherz/Openfire,akrherz/Openfire,GregDThomas/Openfire,GregDThomas/Openfire,GregDThomas/Openfire,igniterealtime/Openfire,akrherz/Openfire,igniterealtime/Openfire,GregDThomas/Openfire,igniterealtime/Openfire,guusdk/Openfire,guusdk/Openfire,guusdk/Openfire,igniterealtime/Openfire,guusdk/Openfire,guusdk/Openfire,GregDThomas/Openfire,akrherz/Openfire,igniterealtime/Openfire