Bug 11684: avoid mixed content warnings using SSL with Amazon - opac-readingrecord and opac-user

To test:

 0) It goes without saying that images being looked at should
    continue to be the proper size and look ok.
 1) In the staff client, change the OPAC system preference
     opacthemes to 'bootstrap'.
 2) Enable Amazon images in the system preferences
 3) Issue a book you know will have images for a known user
 4) Issue a book you know will have images for intentionally
     overdue for the same user
 5) git reset --hard origin/master
 6) In OPAC, log in as the user.
    -- On the 'your summary' tab on the left (which is default),
       a) In the 'Checked out' tab, there should be at least two
          books. The two books issued should have http images.
       b) In the 'Overdue' tag, there should be at least one
          book. The image for the overdue book issued should
          have http images.
 7) Click the 'your reading history' tab on the left.
    -- The images for the two books issued should have
       http images.
 8) Apply the patch
 9) Repeat steps 6-7, but all the images in question should
    have https images now.
10) In the staff client, change the OPAC system preference
     opacthemes to 'prog'.
11) Repeat steps 5-9
12) Run the koha QA test tool

Signed-off-by: Mark Tompsett <mtompset@hotmail.com>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Passes all tests and QA script.
Checked reading history, overdoes, and checkouts in
bootstrap and prog OPAC. Amazon image URL is now https://.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>