[Tests]Clear object attributes for open and wpa networks

Destroy open and wpa network list before starting the next testclass.

Bug: 65127132
Test: Manual

Change-Id: I44e9917308693f72da3831320b83db7cb7032465
diff --git a/acts/tests/google/wifi/WifiManagerTest.py b/acts/tests/google/wifi/WifiManagerTest.py
index 65cb42f..5f1fb86 100755
--- a/acts/tests/google/wifi/WifiManagerTest.py
+++ b/acts/tests/google/wifi/WifiManagerTest.py
@@ -93,6 +93,11 @@
         self.dut.take_bug_report(test_name, begin_time)
         self.dut.cat_adb_log(test_name, begin_time)
 
+    def teardown_class(self):
+        if "AccessPoint" in self.user_params:
+            del self.user_params["reference_networks"]
+            del self.user_params["open_network"]
+
     """Helper Functions"""
 
     def connect_to_wifi_network(self, params):
diff --git a/acts/tests/google/wifi/WifiNetworkSelectorTest.py b/acts/tests/google/wifi/WifiNetworkSelectorTest.py
index a648c46..b52946d 100644
--- a/acts/tests/google/wifi/WifiNetworkSelectorTest.py
+++ b/acts/tests/google/wifi/WifiNetworkSelectorTest.py
@@ -77,6 +77,11 @@
         self.dut.take_bug_report(test_name, begin_time)
         self.dut.cat_adb_log(test_name, begin_time)
 
+    def teardown_class(self):
+        if "AccessPoint" in self.user_params:
+            del self.user_params["reference_networks"]
+            del self.user_params["open_network"]
+
     """ Helper Functions """
 
     def add_networks(self, ad, networks):
diff --git a/acts/tests/google/wifi/WifiNewSetupAutoJoinTest.py b/acts/tests/google/wifi/WifiNewSetupAutoJoinTest.py
index 619fb27..7ecafc8 100644
--- a/acts/tests/google/wifi/WifiNewSetupAutoJoinTest.py
+++ b/acts/tests/google/wifi/WifiNewSetupAutoJoinTest.py
@@ -153,6 +153,11 @@
             self.max_bugreports -= 1
         self.dut.cat_adb_log(test_name, begin_time)
 
+    def teardown_class(self):
+        if "AccessPoint" in self.user_params:
+            del self.user_params["reference_networks"]
+            del self.user_params["open_network"]
+
     """ Tests Begin """
 
     """ Test wifi auto join functionality move in range of AP1.
diff --git a/acts/tests/google/wifi/WifiPnoTest.py b/acts/tests/google/wifi/WifiPnoTest.py
index 4542fa4..31b480e 100644
--- a/acts/tests/google/wifi/WifiPnoTest.py
+++ b/acts/tests/google/wifi/WifiPnoTest.py
@@ -66,6 +66,11 @@
         self.dut.take_bug_report(test_name, begin_time)
         self.dut.cat_adb_log(test_name, begin_time)
 
+    def teardown_class(self):
+        if "AccessPoint" in self.user_params:
+            del self.user_params["reference_networks"]
+            del self.user_params["open_network"]
+
     """Helper Functions"""
 
     def set_attns(self, attn_val_name):
diff --git a/acts/tests/google/wifi/WifiScannerMultiScanTest.py b/acts/tests/google/wifi/WifiScannerMultiScanTest.py
index 14cd318..0ff3574 100755
--- a/acts/tests/google/wifi/WifiScannerMultiScanTest.py
+++ b/acts/tests/google/wifi/WifiScannerMultiScanTest.py
@@ -267,6 +267,11 @@
             self.max_bugreports -= 1
         self.dut.cat_adb_log(test_name, begin_time)
 
+    def teardown_class(self):
+        if "AccessPoint" in self.user_params:
+            del self.user_params["reference_networks"]
+            del self.user_params["open_network"]
+
     """ Helper Functions Begin """
 
     def start_scan(self, scan_setting):
diff --git a/acts/tests/google/wifi/WifiScannerScanTest.py b/acts/tests/google/wifi/WifiScannerScanTest.py
index 8f89559..9eb6d38 100755
--- a/acts/tests/google/wifi/WifiScannerScanTest.py
+++ b/acts/tests/google/wifi/WifiScannerScanTest.py
@@ -120,6 +120,11 @@
             self.max_bugreports -= 1
         self.dut.cat_adb_log(test_name, begin_time)
 
+    def teardown_class(self):
+        if "AccessPoint" in self.user_params:
+            del self.user_params["reference_networks"]
+            del self.user_params["open_network"]
+
     """ Helper Functions Begin """
 
     def wifi_generate_scanner_scan_settings(self, extended, scan_type,