Now that the AM1 DevStudio version for Oxygen has been updated, we need to update the Fuse target platform accordingly. This involves changing the coretests URL in fuse-jbosstools.target to point to http://download.jboss.org/jbosstools/oxygen/staging/updates/coretests/4.5.0.AM1/

This must be done here - https://github.com/jbosstools/jbosstools-fuse/blob/master/targetplatform/multiple/fuse-jbosstools.target#L47