Remove unnecessary and risky reload network for resolvconf propagation (#5322)

Change-Id: I54d706f7941b4b86c4c6cd45340295577155b884

roles/kubernetes/preinstall/tasks/0060-resolvconf.yml

@@ -18,7 +18,7 @@
     create: yes
     backup: yes
     marker: "# Ansible entries {mark}"
-  notify: Preinstall | restart network
+  notify: Preinstall | propagate resolvconf to k8s components
 
 - name: Remove search/domain/nameserver options before block
   replace:
@@ -29,7 +29,7 @@
   with_nested:
     - "{{ [resolvconffile, base|default(''), head|default('')] | difference(['']) }}"
     - [ 'search ', 'nameserver ', 'domain ', 'options ' ]
-  notify: Preinstall | restart network
+  notify: Preinstall | propagate resolvconf to k8s components
 
 - name: Remove search/domain/nameserver options after block
   replace:
@@ -41,7 +41,7 @@
   with_nested:
     - "{{ [resolvconffile, base|default(''), head|default('')] | difference(['']) }}"
     - [ 'search ', 'nameserver ', 'domain ', 'options ' ]
-  notify: Preinstall | restart network
+  notify: Preinstall | propagate resolvconf to k8s components
 
 
 - name: get temporary resolveconf cloud init file content

roles/kubernetes/preinstall/tasks/0100-dhclient-hooks.yml

@@ -11,7 +11,7 @@
     insertbefore: BOF
     backup: yes
     marker: "# Ansible entries {mark}"
-  notify: Preinstall | restart network
+  notify: Preinstall | propagate resolvconf to k8s components
   when: dhclientconffile is defined
 
 - name: Configure dhclient hooks for resolv.conf (non-RH)
@@ -20,7 +20,7 @@
     dest: "{{ dhclienthookfile }}"
     owner: root
     mode: 0755
-  notify: Preinstall | restart network
+  notify: Preinstall | propagate resolvconf to k8s components
   when: ansible_os_family != "RedHat"
 
 - name: Configure dhclient hooks for resolv.conf (RH-only)
@@ -29,5 +29,5 @@
     dest: "{{ dhclienthookfile }}"
     owner: root
     mode: 0755
-  notify: Preinstall | restart network
+  notify: Preinstall | propagate resolvconf to k8s components
   when: ansible_os_family == "RedHat"

roles/kubernetes/preinstall/tasks/0110-dhclient-hooks-undo.yml

@@ -10,11 +10,11 @@
     backup: yes
     marker: "# Ansible entries {mark}"
   when: dhclientconffile is defined
-  notify: Preinstall | restart network
+  notify: Preinstall | propagate resolvconf to k8s components
 
 - name: Remove kubespray specific dhclient hook
   file:
     path: "{{ dhclienthookfile }}"
     state: absent
   when: dhclienthookfile is defined
-  notify: Preinstall | restart network
+  notify: Preinstall | propagate resolvconf to k8s components