avocado.test: Simplify Test.get_tagged_name interface

Test name and test tag can be derived from the class
attributes. Keeping the logdir param is still useful,
as we might want to unittest this interface in the
future.
Signed-off-by: NLucas Meneghel Rodrigues <lmr@redhat.com>

avocado/test.py

@@ -86,8 +86,7 @@ class Test(unittest.TestCase):
             os.makedirs(self.srcdir)
         if base_logdir is None:
             base_logdir = os.path.expanduser('~/avocado')
-        self.tagged_name = self.get_tagged_name(base_logdir, self.name,
-                                                self.tag)
+        self.tagged_name = self.get_tagged_name(base_logdir)
         self.logdir = os.path.join(base_logdir, self.tagged_name)
         if not os.path.isdir(self.logdir):
             os.makedirs(self.logdir)
@@ -142,7 +141,7 @@ class Test(unittest.TestCase):
         """
         self.log.removeHandler(self.file_handler)
 
-    def get_tagged_name(self, logdir, name, tag):
+    def get_tagged_name(self, logdir):
         """
         Get a test tagged name.
 
@@ -151,19 +150,17 @@ class Test(unittest.TestCase):
         clashes in the results directory).
 
         :param logdir: Log directory being in use for result storage.
-        :param name: Test Name.
-        :param tag: Test Tag.
 
         :return: String `test.tag`.
         """
-        if tag is not None:
+        if self.tag is not None:
             return "%s.%s" % (self.name, self.tag)
         tag = 1
-        tagged_name = "%s.%s" % (name, tag)
+        tagged_name = "%s.%s" % (self.name, tag)
         test_logdir = os.path.join(logdir, tagged_name)
         while os.path.isdir(test_logdir):
             tag += 1
-            tagged_name = "%s.%s" % (name, tag)
+            tagged_name = "%s.%s" % (self.name, tag)
             test_logdir = os.path.join(logdir, tagged_name)
         self.tag = str(tag)
         return tagged_name