Fix test failures when removing posts from deleted pools.

These tests failed because removing posts from deleted pools is now
Builder-only.

test/unit/pool_test.rb

@@ -149,6 +149,9 @@ class PoolTest < ActiveSupport::TestCase
 
       context "to a deleted pool" do
         setup do
+          # must be a builder to update deleted pools.
+          CurrentUser.user = FactoryGirl.create(:builder_user)
+
           @pool.update_attribute(:is_deleted, true)
           @pool.post_ids = "#{@pool.post_ids} #{@p2.id}"
           @pool.synchronize!

test/unit/post_test.rb

@@ -111,6 +111,9 @@ class PostTest < ActiveSupport::TestCase
 
       context "that belongs to a pool" do
         setup do
+          # must be a builder to update deleted pools. must be >1 week old to remove posts from pools.
+          CurrentUser.user = FactoryGirl.create(:builder_user, created_at: 1.month.ago)
+
           SqsService.any_instance.stubs(:send_message)
           @pool = FactoryGirl.create(:pool)
           @pool.add!(@post)