Let V1 or V2 can update Host Port and restrict Host Port only 161 or 162

The ticket is:

https://arraynetworks.atlassian.net/browse/TWSD-1442
For C code:

1. I added error message if the port is not 161 or 162.

2. Based on the ticket: https://arraynetworks.atlassian.net/browse/TWSD-1142

   We should show warning only when user change the Engine ID.

For Python code:

1. Because both V1 or V2, V3 can edit port, I added port attribute in class Server, and removed the port attribute in the individual class.

2. There is typo, cause the CLI string is wrong.

   Before changing, the CLI calling is:

snmp auth 192.168.85.142 "" "" ""  161

   After changing, the CLI calling is:

snmp auth 192.168.85.142 "" "" "" "" 161

   The original will cause V1 or V2 cannot update the Host Port because the collumn is in wrong order,

   so it will just set 'level' column to 161, not "".

3. I added new ignore message in BlankParser.

4. I added update function for V1/V2 class.
For HTML code:

The URL of the popup window for adding SNMP Trap Host is:

/api/apv/admintools/snmp/Server/_box_model_add_wizard?context={"asso":[[{"_asso_idx":0}],"SNMP Trap Host"]}

The URL of the popup window for adding SNMP Trap Host with V1 or V2 is:

/api/apv/admintools/snmp/SNMPV1V2Servers/_box_instance_config/ip/{"ipv4": "192.168.85.142"}/type/"v1v2"?context={"asso":[[{"_asso_idx":0}],"SNMP Trap Host"]}

The URL of the popup window for adding SNMP Trap Host with V3 is:

/api/apv/admintools/snmp/SNMPV3Servers/_box_instance_config/ip/{"ipv4": "192.168.85.146"}/type/"v3"?context={"asso":[[{"_asso_idx":0}],"SNMP Trap Host"]}
However, the original template is under common folder(hive/templates).

I don't want to change the common html in the hive/templates,

so I create directory path as the URL:

mkdir /ca/webui/htdocs/new/src/apv/templates/admintools/snmp/Server

mkdir /ca/webui/htdocs/new/src/apv/templates/admintools/snmp/SNMPV1V2Servers

and

mkdir /ca/webui/htdocs/new/src/apv/templates/admintools/snmp/SNMPV3Servers

and put related html to the directory:

cp /ca/webui/htdocs/new/src/hive/templates/box_model_add_wizard.html /ca/webui/htdocs/new/src/apv/templates/admintools/snmp/Server/box_model_add_wizard.html

cp /ca/webui/htdocs/new/src/hive/templates/box_instance_config.html /ca/webui/htdocs/new/src/apv/templates/admintools/snmp/SNMPV1V2Servers/box_instance_config.html

cp /ca/webui/htdocs/new/src/hive/templates/box_instance_config.html /ca/webui/htdocs/new/src/apv/templates/admintools/snmp/SNMPV3Servers/box_instance_config.html

That is,

the box_model_add_wizard.html and box_instance_config is copy from hive/templates, so it won't impact common files(templates).

What I customized is these code:

In box_model_add_wizard.html

(function(){
            // Special handling for SNMP Trap Host 'port' field
            var isEditPage = false;
            {% include 'snmp_trap_host.html' %}
        })();

and in box_instance_config.html (the code for V1V2 and V3 is same)

(function(){
            // Special handling for SNMP Trap Host 'port' field
            var isEditPage = true;
            {% include 'snmp_trap_host.html' %}
        })();

Besides,

I create a html partial: snmp_trap_host.html under the /ca/webui/htdocs/new/src/apv/templates/,

so other new html can import it ({% include 'snmp_trap_host.html' %})

The main logic for HTML part is in snmp_trap_host.html:

1. Get id of the port field (such as textinput_port)

2. I added showSaveChanges function to show "Save Changes" button as the logic in media/js/coffee/hive.coffee

3. The input part is also take media/js/coffee/hive.coffee for reference.

   You can check how the error icon and error message show and see the related DOM in attachment.

   Both "input"(keypress) and "focus click"(focus and click) event will trigger showing the "Save Changes" button (for Edit page).

4. Because "submit" operation will cal both validate and validate_on_blur function, prevent validate_on_blur show message again.

5. In validate, it will show popup window for error message, please see attachment for reference.
I also handle the language text.