tests/nanocoap: add test for coap_opt_add_uquery2()
tests/nanocoap: add test for coap_opt_add_uquery2()

OTAkeys/RIOT,miri64/RIOT,basilfx/RIOT,RIOT-OS/RIOT,OlegHahm/RIOT,ant9000/RIOT,jasonatran/RIOT,ant9000/RIOT,RIOT-OS/RIOT,authmillenon/RIOT,authmillenon/RIOT,ant9000/RIOT,basilfx/RIOT,OlegHahm/RIOT,OlegHahm/RIOT,kaspar030/RIOT,yogo1212/RIOT,OlegHahm/RIOT,miri64/RIOT,kaspar030/RIOT,OTAkeys/RIOT,kYc0o/RIOT,yogo1212/RIOT,miri64/RIOT,kaspar030/RIOT,OTAkeys/RIOT,jasonatran/RIOT,RIOT-OS/RIOT,miri64/RIOT,yogo1212/RIOT,jasonatran/RIOT,authmillenon/RIOT,yogo1212/RIOT,ant9000/RIOT,basilfx/RIOT,authmillenon/RIOT,kaspar030/RIOT,kaspar030/RIOT,ant9000/RIOT,miri64/RIOT,kYc0o/RIOT,jasonatran/RIOT,kYc0o/RIOT,yogo1212/RIOT,kYc0o/RIOT,OTAkeys/RIOT,authmillenon/RIOT,jasonatran/RIOT,RIOT-OS/RIOT,OTAkeys/RIOT,kYc0o/RIOT,basilfx/RIOT,RIOT-OS/RIOT,authmillenon/RIOT,basilfx/RIOT,yogo1212/RIOT,OlegHahm/RIOT