Use present for package state instead of installed

Ansible 2.9 does not accept the "installed" state so we need to update
occurences of that to "present".

Change-Id: I13c95794efc63697c2418334ded7c6912bd7b59f

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

@@ -40,7 +40,7 @@
   become: yes
   package:
     name: "{{ ovs_package }}"
-    state: installed
+    state: present
 
 - name: Ensure openvswitch is started
   become: yes

roles/persistent-firewall/tasks/persist/Debian.yaml

@@ -2,7 +2,7 @@
   become: yes
   package:
     name: iptables-persistent
-    state: installed
+    state: present
 
 - name: Persist ipv4 rules
   become: yes

roles/persistent-firewall/tasks/persist/Ubuntu_trusty.yaml

@@ -2,7 +2,7 @@
   become: yes
   package:
     name: iptables-persistent
-    state: installed
+    state: present
 
 - name: Persist ipv4 rules
   become: yes

test-playbooks/multinode/multi-node-bridge.yaml

@@ -10,7 +10,7 @@
         - name: openvswitch should be installed
           package:
             name: "{{ ovs_package }}"
-            state: installed
+            state: present
           register: ovs_installed
 
         - name: openvswitch should be running