Fix test_create_show_delete_security_group_rule

test_create_show_delete_security_group_rule is validating only
icmp protocol and not tcp/udp protocols. This patch does the
necessary change.

Change-Id: I63b79e5016a718bf3af6e1194a994ec68f6c0c4e
Closes-Bug: #1319176
Merge "Fix test_create_show_delete_security_group_rule"