MNAIO: Use package module properly

To improve the chances of success during builds, retries
are added to the package install tasks. Also, given that
we're using Ansible > 2.1.x, we forgo the with_items loop
for the package installs and just give the package module
the list so that it installs them all at once. Finally,
we ensure that the 'name' argument is used for all package
lists rather than the 'pkg' argument which is for apt only.

Change-Id: I5f27ea0b05c70f6c5396bd41dfe3cce54579ccb3

multi-node-aio/playbooks/deploy-acng.yml

@@ -30,9 +30,14 @@
   tasks:
     - name: Install repo caching server packages
       package:
-        name: "{{ item }}"
+        name: "{{ mnaio_pkg_cache_server_distro_packages }}"
         state: "latest"
-      with_items: "{{ mnaio_pkg_cache_server_distro_packages }}"
+        update_cache: yes
+        cache_valid_time: 600
+      register: _install_host_packages
+      until: _install_host_packages | success
+      retries: 3
+      delay: 15
 
     - name: Create cache directory
       file:

multi-node-aio/playbooks/deploy-dhcp.yml

@@ -28,11 +28,14 @@
 
     - name: Install all required packages for dhcpd_install
       package:
-        pkg: "{{ item }}"
+        name: "{{ mnaio_dhcp_distro_packages }}"
         state: "latest"
         update_cache: yes
         cache_valid_time: 600
-      with_items: "{{ mnaio_dhcp_distro_packages }}"
+      register: _install_host_packages
+      until: _install_host_packages | success
+      retries: 3
+      delay: 15
 
     - name: Enable services
       service:

multi-node-aio/playbooks/deploy-pxe.yml

@@ -30,11 +30,14 @@
 
     - name: Install host distro packages
       package:
-        pkg: "{{ item }}"
+        name: "{{ mnaio_pxe_distro_packages }}"
         state: "latest"
         update_cache: yes
         cache_valid_time: 600
-      with_items: "{{ mnaio_pxe_distro_packages }}"
+      register: _install_host_packages
+      until: _install_host_packages | success
+      retries: 3
+      delay: 15
 
     - name: Create base directories
       file: