There were 2 issues resolved from the support team. I thought I'd post here for others.
1. In Ubuntu 15.1 the network device naming scheme from ethX to a physical location-based name for easier identification and use. This feature breaks FlexLM's ability to determine the hostid of a Linux host because it searches for the primary Ethernet device MAC address by using the ethX naming convention. I updated ubuntu to set the Ethernet adapter name to ethX.
2. The LM _LICENSE_FILE variable value should be the full path to the location the license file is in plus the file name. I only put the folder path.