Use csv-formatted values in message to agent

so that it can be easier parsed using a saner alternative to sscanf() in
the future.

ompi/communicator/comm_init.c

@@ -119,7 +119,7 @@ static int getProcessAgentRank(uint32_t jobid, uint32_t vpid, size_t size) {
 
     char info_to_send[BUFFLEN];
     snprintf(info_to_send, BUFFLEN+1,
-             "Spawned - PID: %d, vpid: %u, jobID: %u, size: %zu",
+             "%d,%u,%u,%zu",
              pid, vpid, jobid, size);
     if (send(fdSock, info_to_send, BUFFLEN+1, 0) < 0) {
         errorExit("send");

rank-swapper-agent/locserv.c

@@ -170,8 +170,8 @@ int main(void) {
         uint32_t vpid;
         uint32_t jobid;
         size_t size;
-        sscanf(client_message, "Spawned - PID: %d, vpid: %u, jobID: %u, size: %zu", &pid, &vpid, &jobid, &size);
-        //printf("\nCheck:    PID: %d, vpid: %u, jobID: %u, size: %zu", pid, vpid, jobid, size);
+        sscanf(client_message, "%d,%u,%u,%zu", &pid, &vpid, &jobid, &size);
+        printf("Spawned - PID: %d, vpid: %u, jobID: %u, size: %zu\n", pid, vpid, jobid, size);
         
         uint32_t desiredRank = getDesiredVpid(jobid, vpid, size, &hstorage);