[mod] move some code from webapp module to webutils module (no functional change)

Over the years the webapp module became more and more a mess.  To improve the
modulaization a little this patch moves some implementations from the webapp
module to webutils module.

HINT: this patch brings non functional change

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

tests/unit/test_standalone_searx.py

@@ -57,7 +57,7 @@ class StandaloneSearx(SearxTestCase):
                 'suggestions': [],
                 'answers': [],
                 'paging': False,
-                'results_number': 0,
+                'number_of_results': 0,
             },
         )
 
@@ -73,7 +73,7 @@ class StandaloneSearx(SearxTestCase):
                     'infoboxes': m_search.infoboxes,
                     'paging': m_search.paging,
                     'results': m_search.get_ordered_results(),
-                    'results_number': m_search.results_number(),
+                    'number_of_results': m_search.number_of_results,
                     'search': {
                         'lang': m_sq.lang,
                         'pageno': m_sq.pageno,

tests/unit/test_webapp.py

@@ -69,7 +69,7 @@ class ViewsTestCase(SearxTestCase):
                 infoboxes=[],
                 unresponsive_engines=set(),
                 results=test_results,
-                results_number=lambda: 3,
+                number_of_results=3,
                 results_length=lambda: len(test_results),
                 get_timings=lambda: timings,
                 redirect_url=None,

tests/unit/test_webutils.py

@@ -64,7 +64,7 @@ class TestWebUtils(SearxTestCase):
 
 class TestUnicodeWriter(SearxTestCase):
     def setUp(self):
-        self.unicode_writer = webutils.UnicodeWriter(mock.MagicMock())
+        self.unicode_writer = webutils.CSVWriter(mock.MagicMock())
 
     def test_write_row(self):
         row = [1, 2, 3]