Invalid argument syntax 'http_port' fix

Changes:
    - Correct the robot argument passing for the above variable

Tested:
    - NA

Change-Id: I0fab13eb758f8bcc9b43015c2acd99dcbd2d9bb5
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/security/test_bmc_network_security.robot b/security/test_bmc_network_security.robot
index 21c63bf..5e3bbdb 100644
--- a/security/test_bmc_network_security.robot
+++ b/security/test_bmc_network_security.robot
@@ -227,7 +227,7 @@
 Establish TCP Connections And Get Connection Failures
     [Documentation]  Establish TCP connections and return nping connection responses.
     [Arguments]  ${target_host}  ${num}=${count}  ${packet_type}=${TCP_CONNECTION}
-    ...          http_port=${80}
+    ...          ${http_port}=${80}
 
     # Description of argument(s):
     # host         The host name or IP address of the target system.