lf_dataplane_test: Fix mutable default arguments

Signed-off-by: Matthew Stidham <stidmatt@gmail.com>

py-scripts/lf_dataplane_test.py

@@ -131,16 +131,24 @@ class DataplaneTest(cv_test):
                  duration="15s",
                  station="1.1.sta01500",
                  dut="NA",
-                 enables=[],
-                 disables=[],
-                 raw_lines=[],
+                 enables=None,
+                 disables=None,
+                 raw_lines=None,
                  raw_lines_file="",
-                 sets=[],
+                 sets=None,
                  graph_groups=None,
                  test_rig=""
                  ):
         super().__init__(lfclient_host=lf_host, lfclient_port=lf_port)
 
+        if enables is None:
+            enables = []
+        if disables is None:
+            disables = []
+        if raw_lines is None:
+            raw_lines = []
+        if sets is None:
+            sets = []
         self.lf_host = lf_host
         self.lf_port = lf_port
         self.lf_user = lf_user