Make security group configurable - dovetail

Make security group configurable - dovetail

Make sercurity group can be configured via the context.
The format would be:
context:
  name: demo
  image: yardstick-image
  flavor: yardstick-flavor
  user: ubuntu
  security_group:
    rules:
        - remote_ip_prefix: "0.0.0.0/0"
          protocol: "tcp"
          port_range_min: 1
          port_range_max: 65535
        - remote_ip_prefix: "0.0.0.0/0"
          protocol: "udp"
          port_range_min: 1
          port_range_max: 65535
        - remote_ip_prefix: "0.0.0.0/0"
          protocol: "icmp"

JIRA: YARDSTICK-1360

Change-Id: I00c45767ee2d70b790590e824599d5a4c274bced
Signed-off-by: rexlee8776 <limingjiang@huawei.com>