Added is_binding attribute to Goal

Fixed test_index to check for data rows only

test/fixtures/exposures.yml

@@ -1,4 +1,4 @@
 exposures_01:
   view_type: Goal
-  view_id: <%= Project.find(1).goals.binding.id %>
+  view: goals_binding
   quantity: quantities_energy

test/fixtures/goals.yml

@@ -0,0 +1,4 @@
+goals_binding:
+  project_id: 1
+  is_binding: true
+  name: '- binding -'

test/fixtures/quantities.yml

@@ -1,5 +1,5 @@
 quantities_energy:
-  project: projects_001
+  project_id: 1
   domain: diet
   parent: null
   lft: 1

test/fixtures/targets.yml

@@ -1,4 +1,4 @@
 targets_01:
-  goal_id: <%= Project.find(1).goals.binding.id %>
+  goal: goals_binding
   condition: '=='
   effective_from: <%= 1.week.ago.to_s(:db) %>

test/fixtures/units.yml

@@ -1,14 +1,14 @@
 units_gram:
-  project: projects_001
+  project_id: 1
   name: 'gram'
   shortname: 'g'
 
 units_percent:
-  project: projects_001
+  project_id: 1
   name: 'percent'
   shortname: '%'
 
 units_kcal:
-  project: projects_001
+  project_id: 1
   name: 'kilocalorie'
   shortname: 'kcal'