_Functional Testing issues_

Branch: dpdk

66b3a54b9feab193a5cf8ad54606d745078587cc --> functional testing fail

Test environment and result as below:

Ubuntu 18.04
Kernel: 4.15.0-generic
Compiler: gcc 7.4
NIC: Mellanox ConnectX-4 Lx 40000 Mbps
Target: x86_64-native-linuxapp-gcc
Fail/Total: 4/4
	Failed Tests:
		- mac_filter
		- mtu_update
		- scatter
		- stats_checks


To view detailed results, visit:
https://lab.dpdk.org/results/dashboard/tarballs/15337/

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