Fix warn unused variable in test (#2388)

Signed-off-by: Jorge Perez <[email protected]>

src/network/NetworkConfig_TEST.cc

@@ -33,30 +33,35 @@ TEST(NetworkManager, ValueConstructor)
     assert(config.role == NetworkRole::None);
     assert(config.numSecondariesExpected == 0);
     // Expect console warning as well
+    (void) config;
   }
 
   {
     // Primary with number of secondaries is valid
     auto config = NetworkConfig::FromValues("PRIMARY", 3);
     assert(config.role == NetworkRole::SimulationPrimary);
     assert(config.numSecondariesExpected == 3);
+    (void) config;
   }
 
   {
     // Secondary is always valid
     auto config = NetworkConfig::FromValues("SECONDARY", 0);
     assert(config.role == NetworkRole::SimulationSecondary);
+    (void) config;
   }
 
   {
     // Readonly is always valid
     auto config = NetworkConfig::FromValues("READONLY");
     assert(config.role == NetworkRole::ReadOnly);
+    (void) config;
   }
 
   {
     // Anything else is invalid
     auto config = NetworkConfig::FromValues("READ_WRITE");
     assert(config.role == NetworkRole::None);
+    (void) config;
   }
 }