Fix group limit test to create block that contain mints and remove duplicated test
Fix group limit test to create block that contain mints and remove duplicated test

zcoinofficial/zcoin,zcoinofficial/zcoin,zcoinofficial/zcoin,zcoinofficial/zcoin,zcoinofficial/zcoin,zcoinofficial/zcoin,zcoinofficial/zcoin,zcoinofficial/zcoin,zcoinofficial/zcoin,zcoinofficial/zcoin