DEV: Take 2 Queue jobs in tests by default.

On my machine this cuts the time taken to run our test suite
from ~11mins to ~9mins.

spec/components/email/receiver_spec.rb

@@ -389,7 +389,6 @@ describe Email::Receiver do
 
     it "supports attached images in TEXT part" do
       SiteSetting.incoming_email_prefer_html = false
-      SiteSetting.queue_jobs = true
 
       expect { process(:no_body_with_image) }.to change { topic.posts.count }
       expect(topic.posts.last.raw).to match(/<img/)
@@ -399,7 +398,6 @@ describe Email::Receiver do
     end
 
     it "supports attached images in HTML part" do
-      SiteSetting.queue_jobs = true
       SiteSetting.incoming_email_prefer_html = true
 
       expect { process(:inline_image) }.to change { topic.posts.count }