Fixed some pyhton issues with static class members.

Signed-off-by: Toni Uhlig <matzeton@googlemail.com>

examples/py-semantic-validation/py-semantic-validation.py

@@ -10,15 +10,14 @@ import nDPIsrvd
 from nDPIsrvd import nDPIsrvdSocket, TermColor
 
 class Stats:
-    event_counter   = dict()
-
-    lines_processed = 0
-    print_dot_every = 10
-    print_nmb_every = print_dot_every * 5
 
     def __init__(self, nDPIsrvd_sock):
-        self.resetEventCounter()
         self.nsock = nDPIsrvd_sock
+        self.event_counter   = dict()
+        self.resetEventCounter()
+        self.lines_processed = 0
+        self.print_dot_every = 10
+        self.print_nmb_every = self.print_dot_every * 5
 
     def resetEventCounter(self):
         keys = ['init','reconnect','shutdown','status', \