Re-enable CI Job with latest Vert.x snapshots

[DavideD]

Snapshots should be here:

you can try with:

  <repository>
     <id>sonatype-s01-snapshots</id>
     <url>https://s01.oss.sonatype.org/content/repositories/snapshots</url>
     <snapshots>
        <enabled>true</enabled>
     </snapshots>
  </repository>

Or

repositories {
  maven {
    url 'https://s01.oss.sonatype.org/content/repositories/snapshots'
  }
}