rename failed as it is not about failure

qa/bin/functional

@@ -125,14 +125,13 @@ class Exec(object):
             return False
         return True
 
-    def failed(self, reason='issue with exabgp'):
+    def report(self, reason='issue with exabgp'):
         print(reason)
         print(f'> {self.command}')
         print(f'return: {self.code}')
         print(f'stdout: {self.stdout.decode()}')
         print(f'stderr: {self.stderr.decode()}')
         print(f'message: {self.message}')
-        return False
 
     def collect(self):
         if self.stdout:
@@ -327,11 +326,16 @@ class EncodingTests(Tests):
             self.collect()
             if self.code == 0:
                 if self._check in self.stdout:
+                    if os.getenv('DEBUG', None) != None:
+                        self.report('completed successfully')
                     return True
                 if self._check in self.stderr:
+                    if os.getenv('DEBUG', None) != None:
+                        self.report('completed successfully')
                     return True
 
-            return self.failed('completed successfully')
+            self.report(f'failed with code {self.code}')
+            return False
 
     API = re.compile(r'^\s*run\s+(.*)\s*?;\s*?$')
 
@@ -503,20 +507,24 @@ class DecodingTests(Tests):
         def success(self):
             self.collect()
             if self.stderr:
-                return self.failed('stderr is \n' + self.stderr)
+                self.report('stderr is \n' + self.stderr)
+                return False
             if not self.stdout:
-                return self.failed('no stdout received')
+                self.report('no stdout received')
+                return False
             try:
                 decoded = json.loads(self.stdout)
                 self._cleanup(decoded)
             except Exception:
-                return self.failed('issue, failed to decode the JSON')
+                self.report('issue, report to decode the JSON')
+                return False
             if decoded != self.conf['json']:
                 from pprint import pformat
                 failure = 'issue, JSON does not match'
                 failure += f'\ndecoded : {pformat(decoded)}\n'
                 failure += f'\nexpected: {pformat(self.conf["json"])}'
-                return self.failed(failure)
+                self.report(failure)
+                return False
             return True
 
     def __init__(self):
@@ -605,7 +613,8 @@ class ParsingTests(Tests):
         def success(self):
             self.collect()
             if self.code != 0:
-                return self.failed('return code is not zero')
+                self.report('return code is not zero')
+                return False
 
             return self.code == 0
 
@@ -675,7 +684,6 @@ class ParsingTests(Tests):
         self.display()
         return success
 
-
 def add_test(subparser, name, tests, extra):
     sub = subparser.add_parser(name, help=f'run {name} test')
     if 'dry' in extra: