rpc: wait longer for session daemon to start up

https://bugzilla.redhat.com/show_bug.cgi?id=1271183

We only wait 0.5 seconds for the session daemon to start up and present
its socket, which isn't sufficient for many users. Bump up the sleep
interval and retry amount so we wait for a total of 5.0 seconds.

(cherry picked from commit ca0c06f4)

src/rpc/virnetsocket.c

@@ -542,7 +542,7 @@ int virNetSocketNewConnectUNIX(const char *path,
     char *lockpath = NULL;
     int lockfd = -1;
     int fd = -1;
-    int retries = 100;
+    int retries = 500;
     virSocketAddr localAddr;
     virSocketAddr remoteAddr;
     char *rundir = NULL;
@@ -635,7 +635,7 @@ int virNetSocketNewConnectUNIX(const char *path,
             daemonLaunched = true;
         }
 
-        usleep(5000);
+        usleep(10000);
     }
 
     localAddr.len = sizeof(localAddr.data);