spec: more fragile plugins spec fixes

refs #CNVS-19842

Change-Id: Ia7748aa1ce10add55486dcd629bd6a3d4cef97c9
Reviewed-on: https://gerrit.instructure.com/52343
Tested-by: Jenkins
Reviewed-by: Dan Minkevitch <dan@instructure.com>
Product-Review: Dan Minkevitch <dan@instructure.com>
QA-Review: James Williams  <jamesw@instructure.com>

spec/integration/security_spec.rb

@@ -521,8 +521,9 @@ describe "security" do
       expect(session[:become_user_id]).to be_nil
       expect(assigns['current_user'].id).to eq @admin.id
       expect(assigns['real_current_user']).to be_nil
-      expect(PageView.last.user_id).to eq @admin.id
-      expect(PageView.last.real_user_id).to be_nil
+      pv1 = PageView.last
+      expect(pv1.user_id).to eq @admin.id
+      expect(pv1.real_user_id).to be_nil
 
       post "/users/#{@student.id}/masquerade"
       assert_response 302
@@ -533,8 +534,9 @@ describe "security" do
       expect(session[:become_user_id]).to eq @student.id.to_s
       expect(assigns['current_user'].id).to eq @student.id
       expect(assigns['real_current_user'].id).to eq @admin.id
-      expect(PageView.last.user_id).to eq @student.id
-      expect(PageView.last.real_user_id).to eq @admin.id
+      pv2 = PageView.all.detect{|pv| pv != pv1}
+      expect(pv2.user_id).to eq @student.id
+      expect(pv2.real_user_id).to eq @admin.id
     end
 
     it "should remember the destination with an intervening auth" do

spec/migrations/set_account_lti_opaque_ids_spec.rb

@@ -22,7 +22,7 @@ require 'lib/data_fixup/set_account_lti_opaque_ids.rb'
 describe 'DataFixup::SetAccountLtiOpaqueIds' do
   describe "up" do
     it "should work" do
-      root_account = Account.default
+      root_account = Account.create!
       original_guid = root_account.lti_guid
       expect(original_guid).not_to be_empty