Why importing VMware OVA file to RHV 4 environment is failing with MAC address error

Issue

• While importing VMs from VMware OVA file, it's failing with below error in the engine log

2016-09-19 09:53:42,983 ERROR [org.ovirt.engine.core.bll.exportimport.ImportVmCommand] (org.ovirt.thread.pool-6-thread-44) [66befa61] Exception: java.lang.reflect.UndeclaredThrowableException
        at com.sun.proxy.$Proxy181.isMacInRange(Unknown Source)
        at org.ovirt.engine.core.bll.network.vm.ExternalVmMacsFinder.findExternalMacAddresses(ExternalVmMacsFinder.java:38) [bll.jar:]
        at org.ovirt.engine.core.bll.exportimport.ImportVmCommandBase.reportExternalMacs(ImportVmCommandBase.java:435) [bll.jar:]
        at org.ovirt.engine.core.bll.exportimport.ImportVmCommandBase.addVmInterfaces(ImportVmCommandBase.java:549) [bll.jar:]
        at org.ovirt.engine.core.bll.exportimport.ImportVmCommandBase.lambda$addVmToDb$1(ImportVmCommandBase.java:455) [bll.jar:]

• This is happening when directly importing the VMware OVA from the admin portal and also when importing the VM from export domain after doing virt-v2v manually.