Add libxml2 to cinder_distro_packages lists

libxml2 is required by cinder services.

Package lists were also alphabetized.

Change-Id: I8cc36f5eab6d21bee84f92b8313df6e9e0512f6f

vars/redhat-7.yml

@@ -18,12 +18,13 @@ tgt_service_name: tgtd
 
 # Common yum packages
 cinder_distro_packages:
+  - iscsi-initiator-utils
+  - kmod-libs
+  - libxml2
   - nfs-utils
   - rpcbind
-  - kmod-libs
-  - zlib-devel
   - which
-  - iscsi-initiator-utils
+  - zlib-devel
 
 cinder_service_distro_packages:
   - openstack-cinder

vars/suse.yml

@@ -19,12 +19,13 @@ tgt_service_name: tgtd
 
 # Common yum packages
 cinder_distro_packages:
-  - nfs-utils
-  - rpcbind
   - libkmod2
-  - which
-  - open-iscsi
   - libpython2_7-1_0
+  - libxml2
+  - nfs-utils
+  - open-iscsi
+  - rpcbind
+  - which
 
 cinder_service_distro_packages:
   - openstack-cinder

vars/ubuntu.yml

@@ -23,13 +23,14 @@ tgt_service_name: tgt
 # Common apt packages
 cinder_distro_packages:
   - libkmod2
+  - libpython2.7
+  - libxml2
   - nfs-common
   - open-iscsi
   - rpcbind
   - rsync
   - zlib1g
   - zlibc
-  - libpython2.7
 
 cinder_service_distro_packages:
   - cinder-api