Removing check for the tax being 0

[Akarshit]

Fix for #3328

This basically keep the same tax flow even if the tax value is 0. And doesn't trigger an exception.

[zenweasel]

@Akarshit How would I go about testing this? Or testing the original issue?

[zenweasel]

We need some way of verifying that
a) there is a problem
b) that this fixes that problem

[Akarshit]

Ok I am not 100% sure about this, but I was able to reproduce this in development mode using the following steps.

1. Set up Avalara settings with Shipping Tax Code as PC040100
2. Checkout the example product with delivery address as
   Country -> United States
   Address -> 250 S 900 E Address -> Cedar Cliff Apartments
   Postal -> 84102 City -> Salt Lake City Region -> Utah
   Phone -> 3852166582(random)
3. You should see some exception on the server console like

Exception in callback of async function: TypeError: Cannot read property 'errorCode' of undefined
    at imports/plugins/included/taxes-avalara/server/hooks/hooks.js:38:13
    at Object.taxCalc.estimateCart (imports/plugins/included/taxes-avalara/server/methods/taxCalc.js:467:14)
    at [object Object].<anonymous> (imports/plugins/included/taxes-avalara/server/hooks/hooks.js:30:13)
    at server/api/method-hooks.js:126:36
    at arrayEach (/Users/z002twn/Akarshit/reaction/node_modules/lodash/_arrayEach.js:15:9)
    at forEach (/Users/z002twn/Akarshit/reaction/node_modules/lodash/forEach.js:38:10)
    at [object Object]._MethodHooks._wrappers.(anonymous function) (server/api/method-hooks.js:125:5)
    at packages/check.js:128:16
    at [object Object].EVp.withValue (packages/meteor.js:1134:15)
    at Object.exports.Match._failIfArgumentsAreNotAllChecked (packages/check.js:127:41)
    at maybeAuditArgumentChecks (packages/ddp-server/livedata_server.js:1765:18)
    at packages/ddp-server/livedata_server.js:1686:15
    at [object Object].EVp.withValue (packages/meteor.js:1134:15)
    at packages/ddp-server/livedata_server.js:1684:36
    at [object Object]._.extend.applyAsync (packages/ddp-server/livedata_server.js:1683:12)
    at [object Object]._.extend.apply (packages/ddp-server/livedata_server.js:1622:26)```