Fix default value for consumer type

[imran2140]

Default value for consumer type needs to be 1, as existing consumers are supposed to be push based.

[oneshadab]

Would swapping the two lines 11 and 12 be an easier solution?

That way if we initialize ConsumerType with it's zero value anywhere in the codebase, it would be push by default.

[imyousuf]

Would swapping the two lines 11 and 12 be an easier solution?

That way if we initialize ConsumerType with it's zero value anywhere in the codebase, it would be push by default.

I would not switch iota values, I would like to keep them as constant as possible

[imyousuf]

Addresses part of #53