72: use uxr_nanos from Micro-XRCE-DDS-Client instead of clock_gettime for random seed generation (#73)

Author: driftregion

rmw_microxrcedds_c/src/rmw_init.c

@@ -23,6 +23,7 @@
 #include <rmw/rmw.h>
 #include <rmw/error_handling.h>
 #include <rmw/allocators.h>
+#include <uxr/client/util/time.h>
 
 #include "./callbacks.h"
 
@@ -82,9 +83,7 @@ rmw_init_options_init(rmw_init_options_t * init_options, rcutils_allocator_t all
   }
 #endif
 
-  struct timespec ts;
-  clock_gettime(CLOCK_REALTIME, &ts);
-  srand((ts.tv_sec * 1000000000UL ) + ts.tv_nsec);
+  srand(uxr_nanos());
 
   do {
     init_options->impl->connection_params.client_key = rand();