Snapshots resolutions fails

[fsimmend]

The snapshots metadata resolution fails if there are multiple non unique timestamps for elements deployed with one snapshot version. As there is no need to provide more than one snapshot entry via a repository is should be easy to use the timestamp of the last build and not the lastmodified of the file.

<metadata modelVersion="1.1.0">
  <groupId>xx.yy</groupId>
  <artifactId>zz</artifactId>
  <version>1-SNAPSHOT</version>
  <versioning>
    <snapshot>
      <timestamp>20120220.140329</timestamp>
      <buildNumber>12</buildNumber>
    </snapshot>
    <lastUpdated>20120220140329</lastUpdated>
    <snapshotVersions>
      <snapshotVersion>
        <extension>war</extension>
        <value>1-20120220.140329-12</value>
        <updated>20120220140329</updated>
      </snapshotVersion>
      <snapshotVersion>
        <extension>pom</extension>
        <value>1-20120220.140329-12</value>
        <updated>20120220140329</updated>
      </snapshotVersion>
    </snapshotVersions>
  </versioning>
</metadata>