I managed to fix this by increasing my java heap size in the initial JAVA_OPTS setup found in /etc/default/virtmgmt and it then let me proceed with the datacenter selection.  New problem now with not recognizing enough available hosts but that's a different problem...

/etc/default/virtmgmt

# Setting JAVA_OPTS

# -----------------

JAVA_OPTS="-Xms8G -Xmx8G -Dpidfile.path=/var/run/virtmgmt/play.pid $JAVA_OPTS"

thanks worked for me