Add PATH to `ip` command execution

It seems that there has been a recent change where the PATH used
has changed somehow.  This adds it and make sure that it covers
all 3 major distros location where `ip` is stored.

Change-Id: Ic3c255bd24d1202fec436d4fcc484ce420110518

roles/multi-node-bridge/tasks/peer.yaml

@@ -45,6 +45,8 @@
   block:
     - name: Verify if the bridge address is set
       shell: ip addr show dev {{ bridge_name }} | grep -q {{ bridge_address_prefix }}.{{ offset }}/{{ bridge_address_subnet }}
+      environment:
+        PATH: '{{ ansible_env.PATH }}:/bin:/sbin:/usr/sbin'
       register: ip_addr_var
       failed_when: False
       changed_when: False
@@ -52,6 +54,8 @@
     - name: Set the bridge address
       become: yes
       command: ip addr add {{ bridge_address_prefix }}.{{ offset }}/{{ bridge_address_subnet }} dev {{ bridge_name }}
+      environment:
+        PATH: '{{ ansible_env.PATH }}:/bin:/sbin:/usr/sbin'
       when: ip_addr_var.rc == 1
 
 - name: Bring subnode bridge interface up

roles/multi-node-bridge/tasks/switch.yaml

@@ -11,6 +11,8 @@
   block:
     - name: Verify if the bridge address is set
       shell: ip addr show dev {{ bridge_name }} | grep -q {{ bridge_address_prefix }}.{{ bridge_address_offset }}/{{ bridge_address_subnet }}
+      environment:
+        PATH: '{{ ansible_env.PATH }}:/bin:/sbin:/usr/sbin'
       register: ip_addr_var
       failed_when: False
       changed_when: False
@@ -18,6 +20,8 @@
     - name: Set the bridge address
       become: yes
       command: ip addr add {{ bridge_address_prefix }}.{{ bridge_address_offset }}/{{ bridge_address_subnet }} dev {{ bridge_name }}
+      environment:
+        PATH: '{{ ansible_env.PATH }}:/bin:/sbin:/usr/sbin'
       when: ip_addr_var.rc == 1
 
 - name: Bring bridge interface up