[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/printing_printer.py

@@ -73,6 +73,7 @@ class PrintingPrinter(models.Model):
         }
         return vals
 
+    # TODO Rename param report to report_name, to make behavior obvious
     @api.multi
     def print_options(self, report=None, format=None, copies=1):
         """ Hook to set print options """
@@ -83,8 +84,9 @@ class PrintingPrinter(models.Model):
             options['copies'] = str(copies)
         return options
 
+    # TODO Rename param report to report_name, to make behavior obvious
     @api.multi
-    def print_document(self, report, content, format, copies=1):
+    def print_document(self, report, content, format, copies=None):
         """ Print a file
 
         Format could be pdf, qweb-pdf, raw, ...
@@ -96,17 +98,19 @@ class PrintingPrinter(models.Model):
             os.write(fd, content)
         finally:
             os.close(fd)
-        if copies == 1:
+        report_obj = self.env["report"]._get_report_from_name(report)
+        if copies is None:
             # If number of copies is not indicated by argument, check context
             # or report definition
             copies = (
                 self.env.context.get('report_copies') or
-                (report and report.report_copies) or
-                copies
+                report_obj.report_copies or
+                1
             )
         return self.print_file(
             file_name, report=report, copies=copies, format=format)
 
+    # TODO Rename param report to report_name, to make behavior obvious
     @api.multi
     def print_file(self, file_name, report=None, copies=1, format=None):
         """ Print a file """