Wean remaining usages of legacy DonationInterface checkout

Change-Id: I77408d7af52d3e9df9c9092917acfcb85477c095
Got rid of the unused RGC test_url

Change-Id: I94f668d27baddd36645276f1febddbab5202f090
Merge "Got rid of the unused RGC test_url"
Fix namespaced CiviMailing exceptions

Change-Id: I9ebc921c951b1ab14cc506ff7b9a77d7c1f1d1e7
Move linebreaking back into Mailer::normalizeContent

Breaking the lines in thank_you_render was adding newlines inside
the template info comment, making it impossible to add CiviMail
records for thank you templates.

Change-Id: Id842dcfde654c1dbd64d3de5b8b5fcd19cbe4ea6
Merge remote-tracking branch 'origin/master' into deployment

115ac58 Move linebreaking back into Mailer::normalizeContent
5806528 Fix namespaced CiviMailing exceptions
055474e Got rid of the unused RGC test_url
b02d13e Wean remaining usages of legacy DonationInterface checkout

Change-Id: I47c58f6b4005da63ea3821d3e3ad358352793553