Fix netchecker network check timeout

It needs 5 min to change status from "succeed" to "failed"

Change-Id: I0edd3b109d0727fb37d7816a1c6d59644fbdeb0f
diff --git a/tcp_tests/helpers/netchecker.py b/tcp_tests/helpers/netchecker.py
index dc58d9c..d3ba466 100644
--- a/tcp_tests/helpers/netchecker.py
+++ b/tcp_tests/helpers/netchecker.py
@@ -66,7 +66,7 @@
         else:
             assert self.get_connectivity_status().status_code == 400
 
-    def wait_check_network(self, works, timeout=60, interval=10):
+    def wait_check_network(self, works, timeout=600, interval=10):
         helpers.wait_pass(
             lambda: self.check_network(works=works),
             timeout=timeout,