Fix: Cleanup Dell OS10 readiness check (#3048)

The Dell OS10 readiness check was just a wait followed by SSH check.
The wait is now implemented with the 'netlab_start_exec' group var,
and the SSH check with the 'netlab_ready' group var

Author: ipspace

netsim/ansible/tasks/readiness-check/dellos10-clab.yml

@@ -90,7 +90,8 @@ clab:
     ansible_ssh_pass: admin
     netlab_check_retries: 40
     netlab_check_delay: 10
-    netlab_initial_delay: 30
+    netlab_start_exec: [ sleep 15 ]     # Dell OS10 needs a bit of time to wake from its slumber
+    netlab_ready: [ ssh ]
 libvirt:
   image: dell/os10
   build: https://netlab.tools/labs/dellos10/

netsim/devices/dellos10.yml

@@ -102,6 +102,8 @@ nodes:
       ipv4: true
     box: vrnetlab/vr-ftosv
     clab:
+      exec:
+      - sleep 15
       kind: vr-ftosv
     device: dellos10
     hostname: clab-input-r1
@@ -249,6 +251,8 @@ nodes:
       ipv4: true
     box: vrnetlab/vr-ftosv
     clab:
+      exec:
+      - sleep 15
       kind: vr-ftosv
     device: dellos10
     hostname: clab-input-r2

tests/topology/expected/lag-l2.yml

@@ -77,6 +77,8 @@ nodes:
       ipv4: true
     box: vrnetlab/vr-ftosv
     clab:
+      exec:
+      - sleep 15
       kind: vr-ftosv
     device: dellos10
     gateway:
@@ -194,6 +196,8 @@ nodes:
       ipv4: true
     box: vrnetlab/vr-ftosv
     clab:
+      exec:
+      - sleep 15
       kind: vr-ftosv
     device: dellos10
     hostname: clab-input-r2

tests/topology/expected/lag-l3.yml

@@ -630,6 +630,8 @@ nodes:
       ipv4: true
     box: vrnetlab/vr-ftosv
     clab:
+      exec:
+      - sleep 15
       kind: vr-ftosv
     device: dellos10
     hostname: clab-input-s1
@@ -924,6 +926,8 @@ nodes:
       ipv4: true
     box: vrnetlab/vr-ftosv
     clab:
+      exec:
+      - sleep 15
       kind: vr-ftosv
     device: dellos10
     hostname: clab-input-s2
@@ -1193,6 +1197,8 @@ nodes:
       ipv4: true
     box: vrnetlab/vr-ftosv
     clab:
+      exec:
+      - sleep 15
       kind: vr-ftosv
     device: dellos10
     hostname: clab-input-s3
@@ -1279,6 +1285,8 @@ nodes:
       ipv4: true
     box: vrnetlab/vr-ftosv
     clab:
+      exec:
+      - sleep 15
       kind: vr-ftosv
     device: dellos10
     hostname: clab-input-s4