Bug 33393: Enable libraries to configure their own text in the 1-Page order PDF

Bug 33393: Enable libraries to configure their own text in the 1-Page order PDF

Test plan:
1) Apply patches and restart services
2) Upgrade Koha schema:
sudo koha-upgrade-schema <instance>
3) Go to Koha Administration -> Libraries. Ensure Library A has an
address, phone and fax.
4) Go to Koha Administration -> System preferences. Search for
OrderPdfFormat. Set this to English 1-page layout option.
5) Go to Acquisitions. Use an existing vendor or create a new one.
Ensure the vendor has a postal address, phone, fax and accout number.
6) Create a basket for this vendor. Add many orders to this basket, for
example 25 items (this is to make the Order PDF cover multiple pages).
7) Close the basket and add it to a basket group of the same name.
8) Edit the basket group. Add an address in the delivery place, and a
delivery comment. Check the box to close the basket group and Save.
9) Click the button to Export as PDF.
10) View the exported PDF. Confirm the PDF is multiple pages long. If it
is not then re-open the basketgroup and add more orders to the basket
and repeat steps 7, 8, and 9
11) If the PDF is multiple pages long then confirm:
- The text "Order number must appear on all related correspondence, shipping papers and invoices. Notify us immediately if you are unable to supply item(s)." appears above the order table.
- The page numbers at the bottom of the first page are not obscured by
the order table.
- That the order table starts near the top of the second page, and not
half way down.
12) Change content in the '1PageOrderPDFText' syspref (use the Enter key
    to split text over multiple lines) and save
13) Back in the Acquisitions module click the button to Export as PDF
14) View the exported PDF. Confirm the following:
- The text above the order table is what you saved in the
1PageOrderPDFText system preference
- The page numbers at the bottom of the first page are not obscrued by
the order table.
- That the order table starts near the top of the second page and not
halfway down.
15) Empty the 1PageOrderPDFText system preference and save
16) Back in the Acquisitions module click te button to Export as PDF
17) View the exported PDF and confirm the line of text between the
Tel/Fax line and the order table has been removed.

Sponsored-by: Pymble Ladies' College
Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>