Corrected unit test

Author: Mika Leppänen

test/nanostack/unittest/6LoWPAN/ws_cfg_settings/test_ws_cfg_settings.c

@@ -175,7 +175,7 @@ static const ws_cfg_t ws_cfg_defaults_small = {
     .sec_prot.sec_prot_trickle_imin = 30,          // network size affects
     .sec_prot.sec_prot_trickle_imax = 90,          // network size affects
     .sec_prot.sec_prot_trickle_timer_exp = 2,      // network size affects
-    .sec_prot.sec_max_ongoing_authentication = 3,  // network size affects
+    .sec_prot.sec_max_ongoing_authentication = 20, // network size affects
     .sec_prot.initial_key_retry_delay = 120,       // network size affects
     .sec_prot.initial_key_imin = 360,              // network size affects
     .sec_prot.initial_key_imax = 500,              // network size affects
@@ -382,7 +382,7 @@ static const ws_cfg_t ws_cfg_defaults_certification = {
     .sec_prot.sec_prot_trickle_imin = 30,          // network size affects
     .sec_prot.sec_prot_trickle_imax = 90,          // network size affects
     .sec_prot.sec_prot_trickle_timer_exp = 2,      // network size affects
-    .sec_prot.sec_max_ongoing_authentication = 3,  // network size affects
+    .sec_prot.sec_max_ongoing_authentication = 20, // network size affects
     .sec_prot.initial_key_retry_delay = 120,       // network size affects
     .sec_prot.initial_key_imin = 360,              // network size affects
     .sec_prot.initial_key_imax = 500,              // network size affects