Merge lp://staging/~henninge/launchpad/devel-741571-filter-templates-in-upload into lp://staging/launchpad

[r=adeuring][bug=732612,741571] Always upload translation templates from soyuz builds.

= Summary =

Apart from fixing bug 741571 as described in the bug, this branch also
addresses a left-over issue from the previous branch. It implements
has_sharing_translation_templates which encapsualates a pattern that
appeared in many places. This makes the code shorter and much better to
read.

I also removed some lint that was already there.

== Implementation details ==

I find this a very straight forward branch and enjoyed coding it. I
hope you can follow along just as easily.

== Tests ==

Lot of stuff has been touched so I'd advise a full test run.

== Demo and Q/A ==

I am not sure how to QA soyuz stuff but you should see only templates
appear in the import queue of a sourcepackage that has upstream
templates.

= Launchpad lint =

Checking for conflicts and issues in changed files.

Linting changed files:
  lib/lp/translations/tests/test_potemplate.py
  lib/lp/registry/tests/test_productseries.py
  lib/lp/translations/templates/distroseries-translations.pt
  lib/lp/translations/tests/test_hastranslationtemplates.py
  lib/lp/translations/interfaces/potemplate.py
  lib/lp/registry/model/productseries.py
  lib/lp/translations/model/translationimportqueue.py
  lib/lp/soyuz/tests/test_sourcepackagerelease.py
  lib/lp/translations/browser/pofile.py
  lib/lp/translations/model/pofile.py
  lib/lp/soyuz/model/sourcepackagerelease.py
  lib/lp/translations/templates/productseries-translations.pt
  lib/lp/translations/doc/translationimportqueue.txt
  lib/lp/registry/interfaces/productseries.py
  lib/lp/registry/model/sourcepackage.py
  lib/lp/translations/browser/productseries.py
  lib/lp/registry/model/product.py
  lib/lp/translations/model/hastranslationtemplates.py
  lib/lp/registry/model/distroseries.py
  lib/lp/translations/utilities/translation_import.py
  lib/lp/translations/interfaces/hastranslationtemplates.py
  lib/lp/translations/model/potemplate.py
  lib/lp/registry/model/distribution.py
  lib/lp/translations/browser/sourcepackage.py
  lib/lp/translations/browser/potemplate.py
  lib/lp/translations/tests/test_translationtemplatescollection.py
  lib/lp/translations/interfaces/translationimportqueue.py
  lib/lp/translations/doc/distroseries-language.txt

./lib/lp/translations/browser/pofile.py
     788: E301 expected 1 blank line, found 2
     904: E301 expected 1 blank line, found 2
./lib/lp/soyuz/model/sourcepackagerelease.py
     201: redefinition of function 'copyright' from line 192
./lib/lp/registry/model/distroseries.py
     392: E301 expected 1 blank line, found 2