Updating javadoc plugin to 2.7 to try to avoid issue MJAVADOC-275
Updating javadoc plugin to 2.7 to try to avoid issue MJAVADOC-275

tombujok/awaitility,awaitility/awaitility,szpak/awaitility,jayway/awaitility,marcoVermeulen/awaitility,marc0der/awaitility,roberttaylor426/awaitility,awaitility/awaitility,tkrueger/awaitility,awaitility/awaitility