Provide different package lists for install and wheel build

Also install libxml2 into the target host.

Change-Id: Ie7eeb360c44d1d496bacb6e7f393ac4a90c0236b
Closes-Bug: 1857899
Related-Bug: 1915617

tasks/main.yml

@@ -50,6 +50,7 @@
   import_role:
     name: "python_venv_build"
   vars:
+    venv_build_distro_package_list: "{{ gnocchi_devel_distro_packages }}"
     venv_python_executable: "{{ gnocchi_venv_python_executable }}"
     venv_build_constraints: "{{ gnocchi_git_constraints }}"
     venv_install_destination_path: "{{ gnocchi_bin | dirname }}"

vars/debian.yml

@@ -16,13 +16,16 @@
 cache_timeout: 600
 
 #: Necessary packages
-gnocchi_distro_packages:
+gnocchi_devel_distro_packages:
   - build-essential
   - git
   - libpq-dev
   - librados-dev
   - libsystemd-dev
-  - python-dev
+  - python3-dev
+
+gnocchi_distro_packages:
+  - libxml2
 
 # NOTE(noonedeadpunk): These variables are left for migration from apache to uwsgi
 # which was introduced during train release. They can be dropped afterwards.
@@ -30,4 +33,4 @@ gnocchi_system_service_name: apache2
 gnocchi_apache_config:
   - "/etc/apache2/sites-enabled/gnocchi-httpd.conf"
   - "/etc/apache2/sites-available/gnocchi-httpd.conf"
-gnocchi_apache_ports: "/etc/apache2/ports.conf"
+gnocchi_apache_ports: "/etc/apache2/ports.conf"

vars/redhat.yml

@@ -14,7 +14,7 @@
 # limitations under the License.
 
 #: Necessary packages
-gnocchi_distro_packages:
+gnocchi_devel_distro_packages:
   - '@Development Tools'
   - git
   - librados2-devel
@@ -23,6 +23,9 @@ gnocchi_distro_packages:
   - systemd-devel
   - which
 
+gnocchi_distro_packages:
+  - libxml2
+
 # NOTE(noonedeadpunk): These variables are left for migration from apache to uwsgi
 # which was introduced during train release. They can be dropped afterwards.
 gnocchi_system_service_name: httpd