[ONME-3089] - Adjust lowpan ND interface connect timeout

Device needs to wait for connectivity:
-routers will create new network and get local connectivity
-end device will get connectivity once attached to existing network
-devices without network settings gets connectivity once
 commissioned and attached to network

Signed-off-by: Kari <kari.haapalehto@arm.com>

features/nanostack/FEATURE_NANOSTACK/mbed-mesh-api/source/LoWPANNDInterface.cpp

@@ -39,7 +39,8 @@ int LoWPANNDInterface::connect()
     // Release mutex before blocking
     nanostack_unlock();
 
-    int32_t count = connect_semaphore.wait(30000);
+    // wait connection for ever
+    int32_t count = connect_semaphore.wait(osWaitForever);
 
     if (count <= 0) {
         return NSAPI_ERROR_DHCP_FAILURE; // sort of...
@@ -124,4 +125,4 @@ bool LoWPANNDInterface::getRouterIpAddress(char *address, int8_t len)
         return true;
     }
     return false;
-}
+}