Backport EE assertions in protected branch related specs.

- Use assertions in the vein of `merge_access_levels.map(&:access_level)`
  instead of `merge_access_levels.first.access_level`

spec/features/protected_branches_spec.rb

@@ -103,7 +103,7 @@ feature 'Projected Branches', feature: true, js: true do
         click_on "Protect"
 
         expect(ProtectedBranch.count).to eq(1)
-        expect(ProtectedBranch.last.push_access_levels.first.access_level).to eq(access_type_id)
+        expect(ProtectedBranch.last.push_access_levels.map(&:access_level)).to eq([access_type_id])
       end
 
       it "allows updating protected branches so that #{access_type_name} can push to them" do
@@ -119,7 +119,7 @@ feature 'Projected Branches', feature: true, js: true do
         end
 
         wait_for_ajax
-        expect(ProtectedBranch.last.push_access_levels.first.access_level).to eq(access_type_id)
+        expect(ProtectedBranch.last.push_access_levels.map(&:access_level)).to include(access_type_id)
       end
     end
 
@@ -138,7 +138,7 @@ feature 'Projected Branches', feature: true, js: true do
         click_on "Protect"
 
         expect(ProtectedBranch.count).to eq(1)
-        expect(ProtectedBranch.last.merge_access_levels.first.access_level).to eq(access_type_id)
+        expect(ProtectedBranch.last.merge_access_levels.map(&:access_level)).to eq([access_type_id])
       end
 
       it "allows updating protected branches so that #{access_type_name} can merge to them" do
@@ -154,7 +154,7 @@ feature 'Projected Branches', feature: true, js: true do
         end
 
         wait_for_ajax
-        expect(ProtectedBranch.last.merge_access_levels.first.access_level).to eq(access_type_id)
+        expect(ProtectedBranch.last.merge_access_levels.map(&:access_level)).to include(access_type_id)
       end
     end
   end

spec/services/git_push_service_spec.rb

@@ -227,8 +227,8 @@ describe GitPushService, services: true do
         expect(project.default_branch).to eq("master")
         execute_service(project, user, @blankrev, 'newrev', 'refs/heads/master' )
         expect(project.protected_branches).not_to be_empty
-        expect(project.protected_branches.first.push_access_levels.first.access_level).to eq(Gitlab::Access::MASTER)
-        expect(project.protected_branches.first.merge_access_levels.first.access_level).to eq(Gitlab::Access::MASTER)
+        expect(project.protected_branches.first.push_access_levels.map(&:access_level)).to eq([Gitlab::Access::MASTER])
+        expect(project.protected_branches.first.merge_access_levels.map(&:access_level)).to eq([Gitlab::Access::MASTER])
       end
 
       it "when pushing a branch for the first time with default branch protection disabled" do
@@ -249,8 +249,8 @@ describe GitPushService, services: true do
         execute_service(project, user, @blankrev, 'newrev', 'refs/heads/master' )
 
         expect(project.protected_branches).not_to be_empty
-        expect(project.protected_branches.last.push_access_levels.first.access_level).to eq(Gitlab::Access::DEVELOPER)
-        expect(project.protected_branches.last.merge_access_levels.first.access_level).to eq(Gitlab::Access::MASTER)
+        expect(project.protected_branches.last.push_access_levels.map(&:access_level)).to eq([Gitlab::Access::DEVELOPER])
+        expect(project.protected_branches.last.merge_access_levels.map(&:access_level)).to eq([Gitlab::Access::MASTER])
       end
 
       it "when pushing a branch for the first time with default branch protection set to 'developers can merge'" do
@@ -260,8 +260,8 @@ describe GitPushService, services: true do
         expect(project.default_branch).to eq("master")
         execute_service(project, user, @blankrev, 'newrev', 'refs/heads/master' )
         expect(project.protected_branches).not_to be_empty
-        expect(project.protected_branches.first.push_access_levels.first.access_level).to eq(Gitlab::Access::MASTER)
-        expect(project.protected_branches.first.merge_access_levels.first.access_level).to eq(Gitlab::Access::DEVELOPER)
+        expect(project.protected_branches.first.push_access_levels.map(&:access_level)).to eq([Gitlab::Access::MASTER])
+        expect(project.protected_branches.first.merge_access_levels.map(&:access_level)).to eq([Gitlab::Access::DEVELOPER])
       end
 
       it "when pushing new commits to existing branch" do