Move Jitsi container image tag to a variable

Related to #554 (Github Pull Request).

roles/matrix-jitsi/defaults/main.yml

@@ -49,8 +49,9 @@ matrix_jitsi_jibri_xmpp_password: ''
 matrix_jitsi_jibri_recorder_user: recorder
 matrix_jitsi_jibri_recorder_password: ''
 
+matrix_jitsi_container_image_tag: "stable-4627-1"
 
-matrix_jitsi_web_docker_image: "jitsi/web:stable-4627-1"
+matrix_jitsi_web_docker_image: "jitsi/web:{{ matrix_jitsi_container_image_tag }}"
 matrix_jitsi_web_docker_image_force_pull: "{{ matrix_jitsi_web_docker_image.endswith(':latest') }}"
 
 matrix_jitsi_web_base_path: "{{ matrix_base_data_path }}/jitsi/web"
@@ -111,7 +112,7 @@ matrix_jitsi_web_config_constraints_video_height_ideal: 720
 matrix_jitsi_web_config_constraints_video_height_max: 720
 matrix_jitsi_web_config_constraints_video_height_min: 240
 
-matrix_jitsi_prosody_docker_image: "jitsi/prosody:stable-4627-1"
+matrix_jitsi_prosody_docker_image: "jitsi/prosody:{{ matrix_jitsi_container_image_tag }}"
 matrix_jitsi_prosody_docker_image_force_pull: "{{ matrix_jitsi_prosody_docker_image.endswith(':latest') }}"
 
 matrix_jitsi_prosody_base_path: "{{ matrix_base_data_path }}/jitsi/prosody"
@@ -125,7 +126,7 @@ matrix_jitsi_prosody_container_extra_arguments: []
 matrix_jitsi_prosody_systemd_required_services_list: ['docker.service']
 
 
-matrix_jitsi_jicofo_docker_image: "jitsi/jicofo:stable-4627-1"
+matrix_jitsi_jicofo_docker_image: "jitsi/jicofo:{{ matrix_jitsi_container_image_tag }}"
 matrix_jitsi_jicofo_docker_image_force_pull: "{{ matrix_jitsi_jicofo_docker_image.endswith(':latest') }}"
 
 matrix_jitsi_jicofo_base_path: "{{ matrix_base_data_path }}/jitsi/jicofo"
@@ -142,7 +143,7 @@ matrix_jitsi_jicofo_auth_user: focus
 matrix_jitsi_jicofo_auth_password: ''
 
 
-matrix_jitsi_jvb_docker_image: "jitsi/jvb:stable-4627-1"
+matrix_jitsi_jvb_docker_image: "jitsi/jvb:{{ matrix_jitsi_container_image_tag }}"
 matrix_jitsi_jvb_docker_image_force_pull: "{{ matrix_jitsi_jvb_docker_image.endswith(':latest') }}"
 
 matrix_jitsi_jvb_base_path: "{{ matrix_base_data_path }}/jitsi/jvb"