Don't create records during a system test

In the officing tests, we were accessing `admin.user` after starting the
browser with a `visit`. However, since `admin` is a method with a `let`
block, the administrator isn't created in the database until we
referenced the variable, meaning we were creating the database record in
the middle of the test. Referencing the variable at the beginning of the
test solves the issue.

We were also creating records to call the `login_as` method in the users
tests, so we're moving the code to create them before the first call to
`visit`.

In the notifiable test, we were doing a loop consisting of "create()" ->
"visit" -> "create()" -> "visit!" -> (...), meaning we were creating the
second user after the first `visit`. Creating every user before the
first `visit` solves the issue.

spec/shared/system/notifiable_in_app.rb

@@ -26,8 +26,10 @@ shared_examples "notifiable in-app" do |factory_name|
   end
 
   scenario "Multiple users commented on my notifiable" do
-    3.times do |n|
-      login_as(create(:user, :verified))
+    users = 3.times.map { create(:user, :verified) }
+
+    users.each.with_index do |user, n|
+      login_as(user)
 
       visit path_for(notifiable)
 
@@ -61,9 +63,10 @@ shared_examples "notifiable in-app" do |factory_name|
 
   scenario "Multiple replies to my comment" do
     comment = create(:comment, commentable: notifiable, user: author)
+    users = 3.times.map { create(:user, :verified) }
 
-    3.times do |n|
-      login_as(create(:user, :verified))
+    users.each.with_index do |user, n|
+      login_as(user)
       visit path_for(notifiable)
 
       within("#comment_#{comment.id}_reply") { click_link "Reply" }

spec/system/polls/voter_spec.rb

@@ -74,6 +74,7 @@ describe "Voter" do
     end
 
     scenario "Voting in booth" do
+      admin_user = admin.user
       login_through_form_as_officer(officer)
 
       visit new_officing_residence_path
@@ -88,7 +89,7 @@ describe "Voter" do
       end
 
       logout
-      login_as(admin.user)
+      login_as(admin_user)
       visit admin_poll_recounts_path(poll)
 
       within("#total_system") do
@@ -155,6 +156,7 @@ describe "Voter" do
       end
 
       scenario "Trying to vote in booth and then in web" do
+        admin_user = admin.user
         login_through_form_as_officer(officer)
 
         vote_for_poll_via_booth
@@ -170,7 +172,7 @@ describe "Voter" do
                                      "You can not participate again."
 
         logout
-        login_as(admin.user)
+        login_as(admin_user)
         visit admin_poll_recounts_path(poll)
 
         within("#total_system") do
@@ -186,6 +188,7 @@ describe "Voter" do
     scenario "Voting in poll and then verifiying account" do
       allow_any_instance_of(Verification::Sms).to receive(:generate_confirmation_code).and_return("1357")
       user = create(:user)
+      admin_user = admin.user
 
       login_through_form_as_officer(officer)
       vote_for_poll_via_booth
@@ -208,7 +211,7 @@ describe "Voter" do
                                    "You can not participate again."
 
       logout
-      login_as(admin.user)
+      login_as(admin_user)
       visit admin_poll_recounts_path(poll)
 
       within("#total_system") do

spec/system/users_spec.rb

@@ -181,6 +181,7 @@ describe "Users" do
     end
 
     scenario "is always visible for admins" do
+      admin = create(:administrator).user
       login_as(user)
       visit account_path
 
@@ -190,13 +191,14 @@ describe "Users" do
       expect(page).to have_content "Changes saved"
 
       logout
-      login_as(create(:administrator).user)
+      login_as(admin)
       visit user_path(user)
 
       expect(page).not_to have_content "activity list private"
     end
 
     scenario "is always visible for moderators" do
+      moderator = create(:moderator).user
       login_as(user)
       visit account_path
 
@@ -206,7 +208,7 @@ describe "Users" do
       expect(page).to have_content "Changes saved"
 
       logout
-      login_as(create(:moderator).user)
+      login_as(moderator)
       visit user_path(user)
 
       expect(page).not_to have_content "activity list private"