Make total number of products in exchange work again.

Currently we are just loading the products from the server and count them.
This can be improved easily in two ways:
- we can switch this to a specific product count call to the server so that we dont load all products all the time
- or we paginate the products result and fetch the total_number from the payload of the first page.

spec/javascripts/unit/admin/order_cycles/controllers/incoming_controller_spec.js.coffee

@@ -13,14 +13,23 @@ describe 'AdminOrderCycleIncomingCtrl', ->
     location =
       absUrl: ->
         'example.com/admin/order_cycles/27/edit'
-    Enterprise =
-      totalVariants: jasmine.createSpy('totalVariants').and.returnValue('variants total')
     ocInstance = {}
 
     module('admin.orderCycles')
     inject ($controller) ->
       ctrl = $controller 'AdminOrderCycleIncomingCtrl', {$scope: scope, $location: location, OrderCycle: OrderCycle, Enterprise: Enterprise, EnterpriseFee: EnterpriseFee, ocInstance: ocInstance}
 
-  it 'Delegates totalVariants to Enterprise', ->
-    expect(scope.enterpriseTotalVariants('enterprise')).toEqual('variants total')
-    expect(Enterprise.totalVariants).toHaveBeenCalledWith('enterprise')
+  it 'counts total variants in a list of products', ->
+    products = [
+                 {variants: [{}]},
+                 {variants: [{}]},
+                 {variants: [{}, {}, {}]}
+               ]
+
+    expect(scope.countVariants(products)).toEqual(5)
+
+  it 'returns zero when products list is null', ->
+    expect(scope.countVariants(null)).toEqual(0)
+
+  it 'returns zero when products list is empty', ->
+    expect(scope.countVariants([])).toEqual(0)

spec/javascripts/unit/admin/order_cycles/services/enterprise_spec.js.coffee

@@ -56,16 +56,3 @@ describe 'Enterprise service', ->
         master_id: 1
         variants: [{id: 2}, {id: 3}]
       expect(Enterprise.variantsOf(p)).toEqual [2, 3]
-
-  it 'counts total variants supplied by an enterprise', ->
-    enterprise =
-      supplied_products: [
-        {variants: []},
-        {variants: []},
-        {variants: [{}, {}, {}]}
-        ]
-
-    expect(Enterprise.totalVariants(enterprise)).toEqual(5)
-
-  it 'returns zero when enterprise is null', ->
-    expect(Enterprise.totalVariants(null)).toEqual(0)