travis: reused downloaded maven artifacts via volumes
travis: reused downloaded maven artifacts via volumes

liimaorg/liima,a-gogo/agogo,a-gogo/agogo,a-gogo/agogo,liimaorg/liima,a-gogo/agogo,liimaorg/liima,a-gogo/agogo,liimaorg/liima,a-gogo/agogo,liimaorg/liima,liimaorg/liima,liimaorg/liima,liimaorg/liima,a-gogo/agogo