Fix tests

Author: valeriansaliou

res/sales_tax_rates.json

@@ -332,7 +332,7 @@
       },
 
       "GC": {
-        "rate": -0.07,
+        "rate": -0.14,
         "type": "igic"
       },
 
@@ -342,7 +342,7 @@
       },
 
       "TF": {
-        "rate": -0.07,
+        "rate": -0.14,
         "type": "igic"
       }
     }

test/sales_tax-test.js

@@ -1719,7 +1719,7 @@ describe("node-sales-tax", function() {
             );
 
             assert.equal(
-              tax.charge.direct, false, "Should perform a direct charge"
+              tax.charge.direct, true, "Should perform a direct charge"
             );
 
             assert.equal(
@@ -1735,7 +1735,7 @@ describe("node-sales-tax", function() {
             );
 
             assert.equal(
-              tax.details.length, 0, "Tax details should be empty"
+              tax.details.length, 1, "Tax details should contain 1 tax rate"
             );
           });
         });