[IMP] base_report_to_printer: Fix XMLRPC calls and tests

- When added the patch to be able to configure report copies by report object, the expected signature changed to expect a report object. That can't work through the XMLRPC interface, so we revert it to what it was before: expecting the report name.
- Some tests that were producing warnings are muted now.
- The tests that had been changed went back to normal too.
- Current implementation didn't produce the expected results when actually forcing to print 1 copy.
- Added a demo report to test, since searching the database for the 1st unkonwn report found is not very deterministic and can lead to problems, like those addressed in #122 and #123.
- Finally, this update requires a database upgrade, so I pushed correctly the manifest version too.

base_report_to_printer/models/report.py

@@ -20,7 +20,11 @@ class Report(models.Model):
             raise exceptions.Warning(
                 _('No printer configured to print this report.')
             )
-        return printer.print_document(report, document, report.report_type)
+        return printer.print_document(
+            report_name,
+            document,
+            report.report_type,
+        )
 
     @api.multi
     def _can_print_report(self, behaviour, printer, document):
@@ -51,6 +55,6 @@ class Report(models.Model):
         can_print_report = self._can_print_report(behaviour, printer, document)
 
         if can_print_report:
-            printer.print_document(report, document, report.report_type)
+            printer.print_document(report_name, document, report.report_type)
 
         return document