Tests: more fixtures.

Common methods from applications/proto.py converted to the fixtures.
sysctl check moved to the specific file where it is using.
Some options moved to the constructor to have early access.

test/unit/applications/proto.py

@@ -10,30 +10,6 @@ from unit.option import option
 class TestApplicationProto(TestControl):
     application_type = None
 
-    def sec_epoch(self):
-        return time.mktime(time.gmtime())
-
-    def date_to_sec_epoch(self, date, template='%a, %d %b %Y %X %Z'):
-        return time.mktime(time.strptime(date, template))
-
-    def findall(self, pattern, name='unit.log', flags=re.M):
-        return re.findall(pattern, Log.read(name), flags)
-
-    def search_in_log(self, pattern, name='unit.log', flags=re.M):
-        return re.search(pattern, Log.read(name), flags)
-
-    def wait_for_record(self, pattern, name='unit.log', wait=150, flags=re.M):
-        with Log.open(name) as f:
-            for _ in range(wait):
-                found = re.search(pattern, f.read(), flags)
-
-                if found is not None:
-                    break
-
-                time.sleep(0.1)
-
-        return found
-
     def get_application_type(self):
         current_test = (
             os.environ.get('PYTEST_CURRENT_TEST').split(':')[-1].split(' ')[0]