Make sure kamailio dependencies are installed in role

data/ansible/roles/install_kamailio/defaults/main.yaml

@@ -7,3 +7,5 @@ kamailio_packages:
   - kamailio
   - kamailio-extra-modules
   - kamailio-json-modules
+kamailio_dependencies:
+  - gnupg

data/ansible/roles/install_kamailio/tasks/main.yaml

@@ -1,4 +1,11 @@
 ---
+- name: Install necessary dependencies for Kamailio
+  become: yes
+  apt:
+    name: "{{ kamailio_dependencies }}"
+    state: present
+    update_cache: yes
+
 - name: Add Kamailio repository key
   become: yes
   apt_key: