added php_packages_extra to package install task

tasks/setup-Debian.yml

@@ -4,7 +4,7 @@
 
 - name: Ensure PHP packages are installed.
   apt:
-    name: "{{ php_packages }}"
+    name: "{{ php_packages + php_packages_extra }}"
     state: "{{ php_packages_state }}"
     install_recommends: "{{ php_install_recommends }}"
   register: php_package_install

tasks/setup-RedHat.yml

@@ -1,7 +1,7 @@
 ---
 - name: Ensure PHP packages are installed.
   package:
-    name: "{{ php_packages }}"
+    name: "{{ php_packages + php_packages_extra }}"
     state: "{{ php_packages_state }}"
     enablerepo: "{{ php_enablerepo | default(omit, true) }}"
   notify: restart webserver