Configure ACL via static file

Configure ACL via static file

This patch allows user to configure ACL/vFW SampleVNF ACL
via configuration file provided in TC definition. The
Yardstick applies the rules to SampleVNF from specified config
file + rules generated by Yardstick (default rules).

The example of SampleVNF ACL CLI commands generated/applied
by Yardstick can be found at (using default ACL config file):

ACL VNF ACL CLI commands:
  acl/tc_heat_rfc2544_ipv4_1rule_1flow_64B_trex.yaml
  http://paste.openstack.org/show/723303/

vFW VNF ACL CLI commands:
  vfw/tc_heat_rfc2544_ipv4_1rule_1flow_64B_trex.yaml
  http://paste.openstack.org/show/723304/

Change-Id: I76a630261a982083b628e3985fc3bec14ca495db
Signed-off-by: Mytnyk, Volodymyr <volodymyrx.mytnyk@intel.com>