Rocks: Seconds drive fails to format

Formatting sdb fails

Problem observed in Rocks 5.0 and Rocks 5.1.

If a .rocks-release is created or present on sdb, the installer crashes during the format stage. To avoid this happening, edit the extend-compute.xml file to rm the .rocks-release in the <post> section of the install.

<post>
rm /state/partition2/.rocks-release
</post>