Add support for IPv4 TTL increment and decrement patterns

[bortok]

The following OTG config fails on

• ixiacom/ixia-c-controller:0.0.1-3027
• ixiacom/ixia-c-traffic-engine:1.4.1.29

  - choice: ipv4
    ipv4:
      time_to_live:
        choice: increment
        increment:
          start: 1
          step: 1
          count: 2

with an error message

"Error occurred while setting Traffic config for user common:Error setting frame for flow p1>p2:Could not add IPv4:Failed constructing IPv4 header:unsupported pattern for IPv4 TTL: increment"

[shramroy]

Yes, only value pattern is supported in controller yet. Can you set a priority for this? Based on that we can schedule the implementation.

[bortok]

It is not a blocker at the moment, but we shall add this to the backlog.

[shramroy]

Okay sure. Thanks for confirming. We have noted the issue.